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Finding the Fourth Proportional to 591,085.40, 885,315.90 and 486,109.40

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Solution

The fourth proportional to 591,085.40, 885,315.90 and 486,109.40 is: 728,084.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    591,085.40 : 885,315.90 = 486,109.40 : x
  2. Step 2: Convert to fraction form
    591,085.40/885,315.90 = 486,109.40/x
  3. Step 3: Cross multiply
    591,085.40x = 885,315.90 × 486,109.40
  4. Step 4: Simplify right side
    591,085.40x = 430,360,380,959.46
  5. Step 5: Solve for x
    x = 430,360,380,959.46/591,085.40
  6. Step 6: Final answer
    x = 728,084.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.