Home / 431,037.28-643,475.72-402,577.12

Finding the Fourth Proportional to 431,037.28, 643,475.72 and 402,577.12

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Solution

The fourth proportional to 431,037.28, 643,475.72 and 402,577.12 is: 600,988.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,037.28 : 643,475.72 = 402,577.12 : x
  2. Step 2: Convert to fraction form
    431,037.28/643,475.72 = 402,577.12/x
  3. Step 3: Cross multiply
    431,037.28x = 643,475.72 × 402,577.12
  4. Step 4: Simplify right side
    431,037.28x = 259,048,602,147.53
  5. Step 5: Solve for x
    x = 259,048,602,147.53/431,037.28
  6. Step 6: Final answer
    x = 600,988.86

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.