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Finding the Fourth Proportional to 561, 841.60 and 190.70

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Solution

The fourth proportional to 561, 841.60 and 190.70 is: 286.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    561 : 841.60 = 190.70 : x
  2. Step 2: Convert to fraction form
    561/841.60 = 190.70/x
  3. Step 3: Cross multiply
    561x = 841.60 × 190.70
  4. Step 4: Simplify right side
    561x = 160,493.12
  5. Step 5: Solve for x
    x = 160,493.12/561
  6. Step 6: Final answer
    x = 286.08

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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.