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Finding the Fourth Proportional to 2,386.91, 3,580.43 and 655.53

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Solution

The fourth proportional to 2,386.91, 3,580.43 and 655.53 is: 983.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,386.91 : 3,580.43 = 655.53 : x
  2. Step 2: Convert to fraction form
    2,386.91/3,580.43 = 655.53/x
  3. Step 3: Cross multiply
    2,386.91x = 3,580.43 × 655.53
  4. Step 4: Simplify right side
    2,386.91x = 2,347,076.00
  5. Step 5: Solve for x
    x = 2,347,076.00/2,386.91
  6. Step 6: Final answer
    x = 983.31

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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.