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Finding the Fourth Proportional to 580.17, 800.65 and 318.18

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Solution

The fourth proportional to 580.17, 800.65 and 318.18 is: 439.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.17 : 800.65 = 318.18 : x
  2. Step 2: Convert to fraction form
    580.17/800.65 = 318.18/x
  3. Step 3: Cross multiply
    580.17x = 800.65 × 318.18
  4. Step 4: Simplify right side
    580.17x = 254,751.23
  5. Step 5: Solve for x
    x = 254,751.23/580.17
  6. Step 6: Final answer
    x = 439.10

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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.