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Finding the Fourth Proportional to 391,570.65, 587,410.65 and 166,929.30

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Solution

The fourth proportional to 391,570.65, 587,410.65 and 166,929.30 is: 250,417.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,570.65 : 587,410.65 = 166,929.30 : x
  2. Step 2: Convert to fraction form
    391,570.65/587,410.65 = 166,929.30/x
  3. Step 3: Cross multiply
    391,570.65x = 587,410.65 × 166,929.30
  4. Step 4: Simplify right side
    391,570.65x = 98,056,048,617.05
  5. Step 5: Solve for x
    x = 98,056,048,617.05/391,570.65
  6. Step 6: Final answer
    x = 250,417.26

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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.