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Finding the Fourth Proportional to 570,503.70, 787,347.92 and 315,854.89

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Solution

The fourth proportional to 570,503.70, 787,347.92 and 315,854.89 is: 435,908.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,503.70 : 787,347.92 = 315,854.89 : x
  2. Step 2: Convert to fraction form
    570,503.70/787,347.92 = 315,854.89/x
  3. Step 3: Cross multiply
    570,503.70x = 787,347.92 × 315,854.89
  4. Step 4: Simplify right side
    570,503.70x = 248,687,687,115.69
  5. Step 5: Solve for x
    x = 248,687,687,115.69/570,503.70
  6. Step 6: Final answer
    x = 435,908.98

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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.