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Finding the Fourth Proportional to 570,818.52, 787,719.56 and 312,700.59

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Solution

The fourth proportional to 570,818.52, 787,719.56 and 312,700.59 is: 431,521.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,818.52 : 787,719.56 = 312,700.59 : x
  2. Step 2: Convert to fraction form
    570,818.52/787,719.56 = 312,700.59/x
  3. Step 3: Cross multiply
    570,818.52x = 787,719.56 × 312,700.59
  4. Step 4: Simplify right side
    570,818.52x = 246,320,369,603.04
  5. Step 5: Solve for x
    x = 246,320,369,603.04/570,818.52
  6. Step 6: Final answer
    x = 431,521.33

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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.