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Finding the Fourth Proportional to 418,147.56, 626,871.15 and 291,416.04

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Solution

The fourth proportional to 418,147.56, 626,871.15 and 291,416.04 is: 436,880.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,147.56 : 626,871.15 = 291,416.04 : x
  2. Step 2: Convert to fraction form
    418,147.56/626,871.15 = 291,416.04/x
  3. Step 3: Cross multiply
    418,147.56x = 626,871.15 × 291,416.04
  4. Step 4: Simplify right side
    418,147.56x = 182,680,308,123.25
  5. Step 5: Solve for x
    x = 182,680,308,123.25/418,147.56
  6. Step 6: Final answer
    x = 436,880.01

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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.