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Finding the Fourth Proportional to 617,534.60, 926,301.90 and 428,577.80

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Solution

The fourth proportional to 617,534.60, 926,301.90 and 428,577.80 is: 642,866.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,534.60 : 926,301.90 = 428,577.80 : x
  2. Step 2: Convert to fraction form
    617,534.60/926,301.90 = 428,577.80/x
  3. Step 3: Cross multiply
    617,534.60x = 926,301.90 × 428,577.80
  4. Step 4: Simplify right side
    617,534.60x = 396,992,430,437.82
  5. Step 5: Solve for x
    x = 396,992,430,437.82/617,534.60
  6. Step 6: Final answer
    x = 642,866.70

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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.