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Finding the Fourth Proportional to 610.76, 842.73 and 400.70

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Solution

The fourth proportional to 610.76, 842.73 and 400.70 is: 552.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.76 : 842.73 = 400.70 : x
  2. Step 2: Convert to fraction form
    610.76/842.73 = 400.70/x
  3. Step 3: Cross multiply
    610.76x = 842.73 × 400.70
  4. Step 4: Simplify right side
    610.76x = 337,681.91
  5. Step 5: Solve for x
    x = 337,681.91/610.76
  6. Step 6: Final answer
    x = 552.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.