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Finding the Fourth Proportional to 680.92, 940 and 503.60

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Solution

The fourth proportional to 680.92, 940 and 503.60 is: 695.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.92 : 940 = 503.60 : x
  2. Step 2: Convert to fraction form
    680.92/940 = 503.60/x
  3. Step 3: Cross multiply
    680.92x = 940 × 503.60
  4. Step 4: Simplify right side
    680.92x = 473,384
  5. Step 5: Solve for x
    x = 473,384/680.92
  6. Step 6: Final answer
    x = 695.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.