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Finding the Fourth Proportional to 571,103.60, 788,122.20 and 316,471.28

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Solution

The fourth proportional to 571,103.60, 788,122.20 and 316,471.28 is: 436,729.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,103.60 : 788,122.20 = 316,471.28 : x
  2. Step 2: Convert to fraction form
    571,103.60/788,122.20 = 316,471.28/x
  3. Step 3: Cross multiply
    571,103.60x = 788,122.20 × 316,471.28
  4. Step 4: Simplify right side
    571,103.60x = 249,418,041,430.42
  5. Step 5: Solve for x
    x = 249,418,041,430.42/571,103.60
  6. Step 6: Final answer
    x = 436,729.94

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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.