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Finding the Fourth Proportional to 387,820.80, 581,990.40 and 177,350.40

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Solution

The fourth proportional to 387,820.80, 581,990.40 and 177,350.40 is: 266,144.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,820.80 : 581,990.40 = 177,350.40 : x
  2. Step 2: Convert to fraction form
    387,820.80/581,990.40 = 177,350.40/x
  3. Step 3: Cross multiply
    387,820.80x = 581,990.40 × 177,350.40
  4. Step 4: Simplify right side
    387,820.80x = 103,216,230,236.16
  5. Step 5: Solve for x
    x = 103,216,230,236.16/387,820.80
  6. Step 6: Final answer
    x = 266,144.13

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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.