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Finding the Fourth Proportional to 391,304.04, 539,998.37 and 216,885.38

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Solution

The fourth proportional to 391,304.04, 539,998.37 and 216,885.38 is: 299,301.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,304.04 : 539,998.37 = 216,885.38 : x
  2. Step 2: Convert to fraction form
    391,304.04/539,998.37 = 216,885.38/x
  3. Step 3: Cross multiply
    391,304.04x = 539,998.37 × 216,885.38
  4. Step 4: Simplify right side
    391,304.04x = 117,117,749,519.05
  5. Step 5: Solve for x
    x = 117,117,749,519.05/391,304.04
  6. Step 6: Final answer
    x = 299,301.15

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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.