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Finding the Fourth Proportional to 671,129.20, 926,290.92 and 384,842.80

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Solution

The fourth proportional to 671,129.20, 926,290.92 and 384,842.80 is: 531,159.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,129.20 : 926,290.92 = 384,842.80 : x
  2. Step 2: Convert to fraction form
    671,129.20/926,290.92 = 384,842.80/x
  3. Step 3: Cross multiply
    671,129.20x = 926,290.92 × 384,842.80
  4. Step 4: Simplify right side
    671,129.20x = 356,476,391,267.38
  5. Step 5: Solve for x
    x = 356,476,391,267.38/671,129.20
  6. Step 6: Final answer
    x = 531,159.11

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1.5x scale

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.