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Finding the Fourth Proportional to 818,807.40, 1,228,211.10 and 608,855.40

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Solution

The fourth proportional to 818,807.40, 1,228,211.10 and 608,855.40 is: 913,283.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,807.40 : 1,228,211.10 = 608,855.40 : x
  2. Step 2: Convert to fraction form
    818,807.40/1,228,211.10 = 608,855.40/x
  3. Step 3: Cross multiply
    818,807.40x = 1,228,211.10 × 608,855.40
  4. Step 4: Simplify right side
    818,807.40x = 747,802,960,574.94
  5. Step 5: Solve for x
    x = 747,802,960,574.94/818,807.40
  6. Step 6: Final answer
    x = 913,283.10

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.