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Finding the Fourth Proportional to 561.14, 841.98 and 317.78

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Solution

The fourth proportional to 561.14, 841.98 and 317.78 is: 476.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.14 : 841.98 = 317.78 : x
  2. Step 2: Convert to fraction form
    561.14/841.98 = 317.78/x
  3. Step 3: Cross multiply
    561.14x = 841.98 × 317.78
  4. Step 4: Simplify right side
    561.14x = 267,564.40
  5. Step 5: Solve for x
    x = 267,564.40/561.14
  6. Step 6: Final answer
    x = 476.82

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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.