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Finding the Fourth Proportional to 992.80, 1,487.56 and 529.92

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Solution

The fourth proportional to 992.80, 1,487.56 and 529.92 is: 794.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.80 : 1,487.56 = 529.92 : x
  2. Step 2: Convert to fraction form
    992.80/1,487.56 = 529.92/x
  3. Step 3: Cross multiply
    992.80x = 1,487.56 × 529.92
  4. Step 4: Simplify right side
    992.80x = 788,287.80
  5. Step 5: Solve for x
    x = 788,287.80/992.80
  6. Step 6: Final answer
    x = 794.00

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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.