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Finding the Fourth Proportional to 413,621.70, 620,432.55 and 371,631.30

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Solution

The fourth proportional to 413,621.70, 620,432.55 and 371,631.30 is: 557,446.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,621.70 : 620,432.55 = 371,631.30 : x
  2. Step 2: Convert to fraction form
    413,621.70/620,432.55 = 371,631.30/x
  3. Step 3: Cross multiply
    413,621.70x = 620,432.55 × 371,631.30
  4. Step 4: Simplify right side
    413,621.70x = 230,572,155,118.82
  5. Step 5: Solve for x
    x = 230,572,155,118.82/413,621.70
  6. Step 6: Final answer
    x = 557,446.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.