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Finding the Fourth Proportional to 610.80, 915.60 and 537.90

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Solution

The fourth proportional to 610.80, 915.60 and 537.90 is: 806.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.80 : 915.60 = 537.90 : x
  2. Step 2: Convert to fraction form
    610.80/915.60 = 537.90/x
  3. Step 3: Cross multiply
    610.80x = 915.60 × 537.90
  4. Step 4: Simplify right side
    610.80x = 492,501.24
  5. Step 5: Solve for x
    x = 492,501.24/610.80
  6. Step 6: Final answer
    x = 806.32

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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.