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Finding the Fourth Proportional to 825,415.20, 1,156,368.60 and 825,415.20

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Solution

The fourth proportional to 825,415.20, 1,156,368.60 and 825,415.20 is: 1,156,368.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    825,415.20 : 1,156,368.60 = 825,415.20 : x
  2. Step 2: Convert to fraction form
    825,415.20/1,156,368.60 = 825,415.20/x
  3. Step 3: Cross multiply
    825,415.20x = 1,156,368.60 × 825,415.20
  4. Step 4: Simplify right side
    825,415.20x = 954,484,219,242.72
  5. Step 5: Solve for x
    x = 954,484,219,242.72/825,415.20
  6. Step 6: Final answer
    x = 1,156,368.60

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.