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Finding the Fourth Proportional to 391,570.80, 587,356.20 and 291,925.62

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Solution

The fourth proportional to 391,570.80, 587,356.20 and 291,925.62 is: 437,888.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,570.80 : 587,356.20 = 291,925.62 : x
  2. Step 2: Convert to fraction form
    391,570.80/587,356.20 = 291,925.62/x
  3. Step 3: Cross multiply
    391,570.80x = 587,356.20 × 291,925.62
  4. Step 4: Simplify right side
    391,570.80x = 171,464,322,845.84
  5. Step 5: Solve for x
    x = 171,464,322,845.84/391,570.80
  6. Step 6: Final answer
    x = 437,888.43

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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.