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Finding the Fourth Proportional to 561.12, 841.68 and 345.96

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Solution

The fourth proportional to 561.12, 841.68 and 345.96 is: 518.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.12 : 841.68 = 345.96 : x
  2. Step 2: Convert to fraction form
    561.12/841.68 = 345.96/x
  3. Step 3: Cross multiply
    561.12x = 841.68 × 345.96
  4. Step 4: Simplify right side
    561.12x = 291,187.61
  5. Step 5: Solve for x
    x = 291,187.61/561.12
  6. Step 6: Final answer
    x = 518.94

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Double scale
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Similar ratio
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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.