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Finding the Fourth Proportional to 608,885.40, 913,328.10 and 451,421.40

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Solution

The fourth proportional to 608,885.40, 913,328.10 and 451,421.40 is: 677,132.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,885.40 : 913,328.10 = 451,421.40 : x
  2. Step 2: Convert to fraction form
    608,885.40/913,328.10 = 451,421.40/x
  3. Step 3: Cross multiply
    608,885.40x = 913,328.10 × 451,421.40
  4. Step 4: Simplify right side
    608,885.40x = 412,295,849,561.34
  5. Step 5: Solve for x
    x = 412,295,849,561.34/608,885.40
  6. Step 6: Final answer
    x = 677,132.10

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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.