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Finding the Fourth Proportional to 391,230.42, 539,904.83 and 219,146.89

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Solution

The fourth proportional to 391,230.42, 539,904.83 and 219,146.89 is: 302,426.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,230.42 : 539,904.83 = 219,146.89 : x
  2. Step 2: Convert to fraction form
    391,230.42/539,904.83 = 219,146.89/x
  3. Step 3: Cross multiply
    391,230.42x = 539,904.83 × 219,146.89
  4. Step 4: Simplify right side
    391,230.42x = 118,318,464,390.48
  5. Step 5: Solve for x
    x = 118,318,464,390.48/391,230.42
  6. Step 6: Final answer
    x = 302,426.55

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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.