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Finding the Fourth Proportional to 566.36, 781.56 and 317.68

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Solution

The fourth proportional to 566.36, 781.56 and 317.68 is: 438.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    566.36 : 781.56 = 317.68 : x
  2. Step 2: Convert to fraction form
    566.36/781.56 = 317.68/x
  3. Step 3: Cross multiply
    566.36x = 781.56 × 317.68
  4. Step 4: Simplify right side
    566.36x = 248,285.98
  5. Step 5: Solve for x
    x = 248,285.98/566.36
  6. Step 6: Final answer
    x = 438.39

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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.