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Finding the Fourth Proportional to 417,851.40, 626,777.10 and 391,279.35

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Solution

The fourth proportional to 417,851.40, 626,777.10 and 391,279.35 is: 586,919.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,851.40 : 626,777.10 = 391,279.35 : x
  2. Step 2: Convert to fraction form
    417,851.40/626,777.10 = 391,279.35/x
  3. Step 3: Cross multiply
    417,851.40x = 626,777.10 × 391,279.35
  4. Step 4: Simplify right side
    417,851.40x = 245,244,936,282.89
  5. Step 5: Solve for x
    x = 245,244,936,282.89/417,851.40
  6. Step 6: Final answer
    x = 586,919.03

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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.