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Finding the Fourth Proportional to 1,580.68, 2,370.12 and 655.48

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Solution

The fourth proportional to 1,580.68, 2,370.12 and 655.48 is: 982.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.68 : 2,370.12 = 655.48 : x
  2. Step 2: Convert to fraction form
    1,580.68/2,370.12 = 655.48/x
  3. Step 3: Cross multiply
    1,580.68x = 2,370.12 × 655.48
  4. Step 4: Simplify right side
    1,580.68x = 1,553,566.26
  5. Step 5: Solve for x
    x = 1,553,566.26/1,580.68
  6. Step 6: Final answer
    x = 982.85

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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.