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Finding the Fourth Proportional to 782.57, 1,080.03 and 585.74

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Solution

The fourth proportional to 782.57, 1,080.03 and 585.74 is: 808.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.57 : 1,080.03 = 585.74 : x
  2. Step 2: Convert to fraction form
    782.57/1,080.03 = 585.74/x
  3. Step 3: Cross multiply
    782.57x = 1,080.03 × 585.74
  4. Step 4: Simplify right side
    782.57x = 632,616.77
  5. Step 5: Solve for x
    x = 632,616.77/782.57
  6. Step 6: Final answer
    x = 808.38

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Double scale
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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.