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Finding the Fourth Proportional to 663,840.30, 915,942.15 and 377,337.83

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Solution

The fourth proportional to 663,840.30, 915,942.15 and 377,337.83 is: 520,636.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,840.30 : 915,942.15 = 377,337.83 : x
  2. Step 2: Convert to fraction form
    663,840.30/915,942.15 = 377,337.83/x
  3. Step 3: Cross multiply
    663,840.30x = 915,942.15 × 377,337.83
  4. Step 4: Simplify right side
    663,840.30x = 345,619,625,576.39
  5. Step 5: Solve for x
    x = 345,619,625,576.39/663,840.30
  6. Step 6: Final answer
    x = 520,636.70

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1.5x scale

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.