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Finding the Fourth Proportional to 783.24, 1,079.46 and 562.20

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Solution

The fourth proportional to 783.24, 1,079.46 and 562.20 is: 774.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.24 : 1,079.46 = 562.20 : x
  2. Step 2: Convert to fraction form
    783.24/1,079.46 = 562.20/x
  3. Step 3: Cross multiply
    783.24x = 1,079.46 × 562.20
  4. Step 4: Simplify right side
    783.24x = 606,872.41
  5. Step 5: Solve for x
    x = 606,872.41/783.24
  6. Step 6: Final answer
    x = 774.82

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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.