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Finding the Fourth Proportional to 391,089.35, 539,710.96 and 255,210.23

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Solution

The fourth proportional to 391,089.35, 539,710.96 and 255,210.23 is: 352,195.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,089.35 : 539,710.96 = 255,210.23 : x
  2. Step 2: Convert to fraction form
    391,089.35/539,710.96 = 255,210.23/x
  3. Step 3: Cross multiply
    391,089.35x = 539,710.96 × 255,210.23
  4. Step 4: Simplify right side
    391,089.35x = 137,739,754,898.54
  5. Step 5: Solve for x
    x = 137,739,754,898.54/391,089.35
  6. Step 6: Final answer
    x = 352,195.11

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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.