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Finding the Fourth Proportional to 570,819.32, 787,730.66 and 316,186.91

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Solution

The fourth proportional to 570,819.32, 787,730.66 and 316,186.91 is: 436,337.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,819.32 : 787,730.66 = 316,186.91 : x
  2. Step 2: Convert to fraction form
    570,819.32/787,730.66 = 316,186.91/x
  3. Step 3: Cross multiply
    570,819.32x = 787,730.66 × 316,186.91
  4. Step 4: Simplify right side
    570,819.32x = 249,070,121,716.73
  5. Step 5: Solve for x
    x = 249,070,121,716.73/570,819.32
  6. Step 6: Final answer
    x = 436,337.93

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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.