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Finding the Fourth Proportional to 383.32, 529.52 and 317.80

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Solution

The fourth proportional to 383.32, 529.52 and 317.80 is: 439.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.32 : 529.52 = 317.80 : x
  2. Step 2: Convert to fraction form
    383.32/529.52 = 317.80/x
  3. Step 3: Cross multiply
    383.32x = 529.52 × 317.80
  4. Step 4: Simplify right side
    383.32x = 168,281.46
  5. Step 5: Solve for x
    x = 168,281.46/383.32
  6. Step 6: Final answer
    x = 439.01

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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.