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Finding the Fourth Proportional to 709,766.15, 979,492.11 and 387,489.83

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Solution

The fourth proportional to 709,766.15, 979,492.11 and 387,489.83 is: 534,744.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,766.15 : 979,492.11 = 387,489.83 : x
  2. Step 2: Convert to fraction form
    709,766.15/979,492.11 = 387,489.83/x
  3. Step 3: Cross multiply
    709,766.15x = 979,492.11 × 387,489.83
  4. Step 4: Simplify right side
    709,766.15x = 379,543,231,190.24
  5. Step 5: Solve for x
    x = 379,543,231,190.24/709,766.15
  6. Step 6: Final answer
    x = 534,744.06

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Half scale
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Double scale
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Similar ratio
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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.