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Finding the Fourth Proportional to 782.63, 1,080.06 and 433.31

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Solution

The fourth proportional to 782.63, 1,080.06 and 433.31 is: 597.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.63 : 1,080.06 = 433.31 : x
  2. Step 2: Convert to fraction form
    782.63/1,080.06 = 433.31/x
  3. Step 3: Cross multiply
    782.63x = 1,080.06 × 433.31
  4. Step 4: Simplify right side
    782.63x = 468,000.80
  5. Step 5: Solve for x
    x = 468,000.80/782.63
  6. Step 6: Final answer
    x = 597.98

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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.