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Finding the Fourth Proportional to 570,789.30, 787,645.89 and 316,135.02

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Solution

The fourth proportional to 570,789.30, 787,645.89 and 316,135.02 is: 436,242.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,789.30 : 787,645.89 = 316,135.02 : x
  2. Step 2: Convert to fraction form
    570,789.30/787,645.89 = 316,135.02/x
  3. Step 3: Cross multiply
    570,789.30x = 787,645.89 × 316,135.02
  4. Step 4: Simplify right side
    570,789.30x = 249,002,449,188.07
  5. Step 5: Solve for x
    x = 249,002,449,188.07/570,789.30
  6. Step 6: Final answer
    x = 436,242.32

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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.