Home / 643,318.76-963,760.05-429,441.71

Finding the Fourth Proportional to 643,318.76, 963,760.05 and 429,441.71

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Solution

The fourth proportional to 643,318.76, 963,760.05 and 429,441.71 is: 643,349.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,318.76 : 963,760.05 = 429,441.71 : x
  2. Step 2: Convert to fraction form
    643,318.76/963,760.05 = 429,441.71/x
  3. Step 3: Cross multiply
    643,318.76x = 963,760.05 × 429,441.71
  4. Step 4: Simplify right side
    643,318.76x = 413,878,759,082.89
  5. Step 5: Solve for x
    x = 413,878,759,082.89/643,318.76
  6. Step 6: Final answer
    x = 643,349.43

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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.