Home / 656,390.10-905,986.86-427,517.70

Finding the Fourth Proportional to 656,390.10, 905,986.86 and 427,517.70

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Solution

The fourth proportional to 656,390.10, 905,986.86 and 427,517.70 is: 590,084.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,390.10 : 905,986.86 = 427,517.70 : x
  2. Step 2: Convert to fraction form
    656,390.10/905,986.86 = 427,517.70/x
  3. Step 3: Cross multiply
    656,390.10x = 905,986.86 × 427,517.70
  4. Step 4: Simplify right side
    656,390.10x = 387,325,418,617.42
  5. Step 5: Solve for x
    x = 387,325,418,617.42/656,390.10
  6. Step 6: Final answer
    x = 590,084.19

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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.