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Finding the Fourth Proportional to 391,228.42, 539,902.07 and 219,144.89

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Solution

The fourth proportional to 391,228.42, 539,902.07 and 219,144.89 is: 302,423.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,228.42 : 539,902.07 = 219,144.89 : x
  2. Step 2: Convert to fraction form
    391,228.42/539,902.07 = 219,144.89/x
  3. Step 3: Cross multiply
    391,228.42x = 539,902.07 × 219,144.89
  4. Step 4: Simplify right side
    391,228.42x = 118,316,779,740.92
  5. Step 5: Solve for x
    x = 118,316,779,740.92/391,228.42
  6. Step 6: Final answer
    x = 302,423.79

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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.