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Finding the Fourth Proportional to 2,386.88, 3,580.56 and 655.50

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Solution

The fourth proportional to 2,386.88, 3,580.56 and 655.50 is: 983.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,386.88 : 3,580.56 = 655.50 : x
  2. Step 2: Convert to fraction form
    2,386.88/3,580.56 = 655.50/x
  3. Step 3: Cross multiply
    2,386.88x = 3,580.56 × 655.50
  4. Step 4: Simplify right side
    2,386.88x = 2,347,057.08
  5. Step 5: Solve for x
    x = 2,347,057.08/2,386.88
  6. Step 6: Final answer
    x = 983.32

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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.