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Finding the Fourth Proportional to 570,815.61, 787,697.43 and 312,693.68

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Solution

The fourth proportional to 570,815.61, 787,697.43 and 312,693.68 is: 431,501.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,815.61 : 787,697.43 = 312,693.68 : x
  2. Step 2: Convert to fraction form
    570,815.61/787,697.43 = 312,693.68/x
  3. Step 3: Cross multiply
    570,815.61x = 787,697.43 × 312,693.68
  4. Step 4: Simplify right side
    570,815.61x = 246,308,006,925.73
  5. Step 5: Solve for x
    x = 246,308,006,925.73/570,815.61
  6. Step 6: Final answer
    x = 431,501.87

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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.