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Finding the Fourth Proportional to 570,982.78, 787,925.17 and 316,318.78

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Solution

The fourth proportional to 570,982.78, 787,925.17 and 316,318.78 is: 436,502.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,982.78 : 787,925.17 = 316,318.78 : x
  2. Step 2: Convert to fraction form
    570,982.78/787,925.17 = 316,318.78/x
  3. Step 3: Cross multiply
    570,982.78x = 787,925.17 × 316,318.78
  4. Step 4: Simplify right side
    570,982.78x = 249,235,528,505.69
  5. Step 5: Solve for x
    x = 249,235,528,505.69/570,982.78
  6. Step 6: Final answer
    x = 436,502.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.