Home / 391,024.60-539,569.31-218,918.63

Finding the Fourth Proportional to 391,024.60, 539,569.31 and 218,918.63

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Solution

The fourth proportional to 391,024.60, 539,569.31 and 218,918.63 is: 302,082.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,024.60 : 539,569.31 = 218,918.63 : x
  2. Step 2: Convert to fraction form
    391,024.60/539,569.31 = 218,918.63/x
  3. Step 3: Cross multiply
    391,024.60x = 539,569.31 × 218,918.63
  4. Step 4: Simplify right side
    391,024.60x = 118,121,774,389.58
  5. Step 5: Solve for x
    x = 118,121,774,389.58/391,024.60
  6. Step 6: Final answer
    x = 302,082.72

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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.