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Finding the Fourth Proportional to 650,427.52, 975,641.28 and 428,759.68

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Solution

The fourth proportional to 650,427.52, 975,641.28 and 428,759.68 is: 643,139.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    650,427.52 : 975,641.28 = 428,759.68 : x
  2. Step 2: Convert to fraction form
    650,427.52/975,641.28 = 428,759.68/x
  3. Step 3: Cross multiply
    650,427.52x = 975,641.28 × 428,759.68
  4. Step 4: Simplify right side
    650,427.52x = 418,315,643,007.59
  5. Step 5: Solve for x
    x = 418,315,643,007.59/650,427.52
  6. Step 6: Final answer
    x = 643,139.52

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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.