Home / 391,115.76-539,671.20-240,261.36

Finding the Fourth Proportional to 391,115.76, 539,671.20 and 240,261.36

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Solution

The fourth proportional to 391,115.76, 539,671.20 and 240,261.36 is: 331,518.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,115.76 : 539,671.20 = 240,261.36 : x
  2. Step 2: Convert to fraction form
    391,115.76/539,671.20 = 240,261.36/x
  3. Step 3: Cross multiply
    391,115.76x = 539,671.20 × 240,261.36
  4. Step 4: Simplify right side
    391,115.76x = 129,662,136,464.83
  5. Step 5: Solve for x
    x = 129,662,136,464.83/391,115.76
  6. Step 6: Final answer
    x = 331,518.57

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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.