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Finding the Fourth Proportional to 782.96, 1,079.92 and 573.20

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Solution

The fourth proportional to 782.96, 1,079.92 and 573.20 is: 790.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.96 : 1,079.92 = 573.20 : x
  2. Step 2: Convert to fraction form
    782.96/1,079.92 = 573.20/x
  3. Step 3: Cross multiply
    782.96x = 1,079.92 × 573.20
  4. Step 4: Simplify right side
    782.96x = 619,010.14
  5. Step 5: Solve for x
    x = 619,010.14/782.96
  6. Step 6: Final answer
    x = 790.60

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1.5x scale

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.