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Finding the Fourth Proportional to 770.02, 1,149.95 and 727.90

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Solution

The fourth proportional to 770.02, 1,149.95 and 727.90 is: 1,087.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.02 : 1,149.95 = 727.90 : x
  2. Step 2: Convert to fraction form
    770.02/1,149.95 = 727.90/x
  3. Step 3: Cross multiply
    770.02x = 1,149.95 × 727.90
  4. Step 4: Simplify right side
    770.02x = 837,048.61
  5. Step 5: Solve for x
    x = 837,048.61/770.02
  6. Step 6: Final answer
    x = 1,087.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.