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Finding the Fourth Proportional to 760.08, 1,046.20 and 681.12

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Solution

The fourth proportional to 760.08, 1,046.20 and 681.12 is: 937.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.08 : 1,046.20 = 681.12 : x
  2. Step 2: Convert to fraction form
    760.08/1,046.20 = 681.12/x
  3. Step 3: Cross multiply
    760.08x = 1,046.20 × 681.12
  4. Step 4: Simplify right side
    760.08x = 712,587.74
  5. Step 5: Solve for x
    x = 712,587.74/760.08
  6. Step 6: Final answer
    x = 937.52

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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.