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Finding the Fourth Proportional to 520,131.32, 717,772.74 and 290,691.80

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Solution

The fourth proportional to 520,131.32, 717,772.74 and 290,691.80 is: 401,149.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,131.32 : 717,772.74 = 290,691.80 : x
  2. Step 2: Convert to fraction form
    520,131.32/717,772.74 = 290,691.80/x
  3. Step 3: Cross multiply
    520,131.32x = 717,772.74 × 290,691.80
  4. Step 4: Simplify right side
    520,131.32x = 208,650,649,781.53
  5. Step 5: Solve for x
    x = 208,650,649,781.53/520,131.32
  6. Step 6: Final answer
    x = 401,149.94

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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.