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Finding the Fourth Proportional to 550,085.80, 825,128.70 and 410,117.80

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Solution

The fourth proportional to 550,085.80, 825,128.70 and 410,117.80 is: 615,176.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,085.80 : 825,128.70 = 410,117.80 : x
  2. Step 2: Convert to fraction form
    550,085.80/825,128.70 = 410,117.80/x
  3. Step 3: Cross multiply
    550,085.80x = 825,128.70 × 410,117.80
  4. Step 4: Simplify right side
    550,085.80x = 338,399,967,160.86
  5. Step 5: Solve for x
    x = 338,399,967,160.86/550,085.80
  6. Step 6: Final answer
    x = 615,176.70

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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.