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Finding the Fourth Proportional to 571,120.20, 788,145.82 and 316,471.39

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Solution

The fourth proportional to 571,120.20, 788,145.82 and 316,471.39 is: 436,730.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,120.20 : 788,145.82 = 316,471.39 : x
  2. Step 2: Convert to fraction form
    571,120.20/788,145.82 = 316,471.39/x
  3. Step 3: Cross multiply
    571,120.20x = 788,145.82 × 316,471.39
  4. Step 4: Simplify right side
    571,120.20x = 249,425,600,416.55
  5. Step 5: Solve for x
    x = 249,425,600,416.55/571,120.20
  6. Step 6: Final answer
    x = 436,730.48

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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.