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Finding the Fourth Proportional to 666,115.65, 919,184.13 and 375,711.21

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Solution

The fourth proportional to 666,115.65, 919,184.13 and 375,711.21 is: 518,450.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,115.65 : 919,184.13 = 375,711.21 : x
  2. Step 2: Convert to fraction form
    666,115.65/919,184.13 = 375,711.21/x
  3. Step 3: Cross multiply
    666,115.65x = 919,184.13 × 375,711.21
  4. Step 4: Simplify right side
    666,115.65x = 345,347,781,695.10
  5. Step 5: Solve for x
    x = 345,347,781,695.10/666,115.65
  6. Step 6: Final answer
    x = 518,450.18

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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.