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Finding the Fourth Proportional to 566.28, 781.45 and 317.60

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Solution

The fourth proportional to 566.28, 781.45 and 317.60 is: 438.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    566.28 : 781.45 = 317.60 : x
  2. Step 2: Convert to fraction form
    566.28/781.45 = 317.60/x
  3. Step 3: Cross multiply
    566.28x = 781.45 × 317.60
  4. Step 4: Simplify right side
    566.28x = 248,188.52
  5. Step 5: Solve for x
    x = 248,188.52/566.28
  6. Step 6: Final answer
    x = 438.28

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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.