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Finding the Fourth Proportional to 630.90, 945.52 and 322.49

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Solution

The fourth proportional to 630.90, 945.52 and 322.49 is: 483.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.90 : 945.52 = 322.49 : x
  2. Step 2: Convert to fraction form
    630.90/945.52 = 322.49/x
  3. Step 3: Cross multiply
    630.90x = 945.52 × 322.49
  4. Step 4: Simplify right side
    630.90x = 304,920.74
  5. Step 5: Solve for x
    x = 304,920.74/630.90
  6. Step 6: Final answer
    x = 483.31

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.