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Finding the Fourth Proportional to 391,187.51, 539,648.26 and 255,159.75

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Solution

The fourth proportional to 391,187.51, 539,648.26 and 255,159.75 is: 351,996.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,187.51 : 539,648.26 = 255,159.75 : x
  2. Step 2: Convert to fraction form
    391,187.51/539,648.26 = 255,159.75/x
  3. Step 3: Cross multiply
    391,187.51x = 539,648.26 × 255,159.75
  4. Step 4: Simplify right side
    391,187.51x = 137,696,516,495.32
  5. Step 5: Solve for x
    x = 137,696,516,495.32/391,187.51
  6. Step 6: Final answer
    x = 351,996.20

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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.