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Finding the Fourth Proportional to 663,336.34, 915,428.62 and 376,904.94

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Solution

The fourth proportional to 663,336.34, 915,428.62 and 376,904.94 is: 520,142.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,336.34 : 915,428.62 = 376,904.94 : x
  2. Step 2: Convert to fraction form
    663,336.34/915,428.62 = 376,904.94/x
  3. Step 3: Cross multiply
    663,336.34x = 915,428.62 × 376,904.94
  4. Step 4: Simplify right side
    663,336.34x = 345,029,569,095.38
  5. Step 5: Solve for x
    x = 345,029,569,095.38/663,336.34
  6. Step 6: Final answer
    x = 520,142.72

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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.