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Finding the Fourth Proportional to 391,245.84, 539,902.80 and 219,180.24

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Solution

The fourth proportional to 391,245.84, 539,902.80 and 219,180.24 is: 302,459.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,245.84 : 539,902.80 = 219,180.24 : x
  2. Step 2: Convert to fraction form
    391,245.84/539,902.80 = 219,180.24/x
  3. Step 3: Cross multiply
    391,245.84x = 539,902.80 × 219,180.24
  4. Step 4: Simplify right side
    391,245.84x = 118,336,025,280.67
  5. Step 5: Solve for x
    x = 118,336,025,280.67/391,245.84
  6. Step 6: Final answer
    x = 302,459.51

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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.