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Finding the Fourth Proportional to 2,387.13, 3,580.62 and 655.74

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Solution

The fourth proportional to 2,387.13, 3,580.62 and 655.74 is: 983.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,387.13 : 3,580.62 = 655.74 : x
  2. Step 2: Convert to fraction form
    2,387.13/3,580.62 = 655.74/x
  3. Step 3: Cross multiply
    2,387.13x = 3,580.62 × 655.74
  4. Step 4: Simplify right side
    2,387.13x = 2,347,955.76
  5. Step 5: Solve for x
    x = 2,347,955.76/2,387.13
  6. Step 6: Final answer
    x = 983.59

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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.