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Finding the Fourth Proportional to 630.32, 869.84 and 346.75

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Solution

The fourth proportional to 630.32, 869.84 and 346.75 is: 478.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.32 : 869.84 = 346.75 : x
  2. Step 2: Convert to fraction form
    630.32/869.84 = 346.75/x
  3. Step 3: Cross multiply
    630.32x = 869.84 × 346.75
  4. Step 4: Simplify right side
    630.32x = 301,617.02
  5. Step 5: Solve for x
    x = 301,617.02/630.32
  6. Step 6: Final answer
    x = 478.51

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Half scale
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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.