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Finding the Fourth Proportional to 750.80, 1,127.40 and 546.80

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Solution

The fourth proportional to 750.80, 1,127.40 and 546.80 is: 821.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.80 : 1,127.40 = 546.80 : x
  2. Step 2: Convert to fraction form
    750.80/1,127.40 = 546.80/x
  3. Step 3: Cross multiply
    750.80x = 1,127.40 × 546.80
  4. Step 4: Simplify right side
    750.80x = 616,462.32
  5. Step 5: Solve for x
    x = 616,462.32/750.80
  6. Step 6: Final answer
    x = 821.07

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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.