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Finding the Fourth Proportional to 656,427.40, 984,641.10 and 652,280.20

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Solution

The fourth proportional to 656,427.40, 984,641.10 and 652,280.20 is: 978,420.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,427.40 : 984,641.10 = 652,280.20 : x
  2. Step 2: Convert to fraction form
    656,427.40/984,641.10 = 652,280.20/x
  3. Step 3: Cross multiply
    656,427.40x = 984,641.10 × 652,280.20
  4. Step 4: Simplify right side
    656,427.40x = 642,261,893,636.22
  5. Step 5: Solve for x
    x = 642,261,893,636.22/656,427.40
  6. Step 6: Final answer
    x = 978,420.30

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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.