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Finding the Fourth Proportional to 561.02, 841.64 and 170.99

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Solution

The fourth proportional to 561.02, 841.64 and 170.99 is: 256.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.02 : 841.64 = 170.99 : x
  2. Step 2: Convert to fraction form
    561.02/841.64 = 170.99/x
  3. Step 3: Cross multiply
    561.02x = 841.64 × 170.99
  4. Step 4: Simplify right side
    561.02x = 143,906.96
  5. Step 5: Solve for x
    x = 143,906.96/561.02
  6. Step 6: Final answer
    x = 256.51

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Find fourth proportional to 280.51, 420.82 and 85.49
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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.