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Finding the Fourth Proportional to 395,871.50, 545,570.10 and 281,155.19

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Solution

The fourth proportional to 395,871.50, 545,570.10 and 281,155.19 is: 387,473.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,871.50 : 545,570.10 = 281,155.19 : x
  2. Step 2: Convert to fraction form
    395,871.50/545,570.10 = 281,155.19/x
  3. Step 3: Cross multiply
    395,871.50x = 545,570.10 × 281,155.19
  4. Step 4: Simplify right side
    395,871.50x = 153,389,862,395.97
  5. Step 5: Solve for x
    x = 153,389,862,395.97/395,871.50
  6. Step 6: Final answer
    x = 387,473.87

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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.