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Finding the Fourth Proportional to 561.32, 841.43 and 253.25

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Solution

The fourth proportional to 561.32, 841.43 and 253.25 is: 379.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.32 : 841.43 = 253.25 : x
  2. Step 2: Convert to fraction form
    561.32/841.43 = 253.25/x
  3. Step 3: Cross multiply
    561.32x = 841.43 × 253.25
  4. Step 4: Simplify right side
    561.32x = 213,086.67
  5. Step 5: Solve for x
    x = 213,086.67/561.32
  6. Step 6: Final answer
    x = 379.62

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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.