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Finding the Fourth Proportional to 782.37, 1,080.08 and 572.31

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Solution

The fourth proportional to 782.37, 1,080.08 and 572.31 is: 790.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.37 : 1,080.08 = 572.31 : x
  2. Step 2: Convert to fraction form
    782.37/1,080.08 = 572.31/x
  3. Step 3: Cross multiply
    782.37x = 1,080.08 × 572.31
  4. Step 4: Simplify right side
    782.37x = 618,137.72
  5. Step 5: Solve for x
    x = 618,137.72/782.37
  6. Step 6: Final answer
    x = 790.08

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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.