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Finding the Fourth Proportional to 611.40, 844.13 and 545.79

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Solution

The fourth proportional to 611.40, 844.13 and 545.79 is: 753.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.40 : 844.13 = 545.79 : x
  2. Step 2: Convert to fraction form
    611.40/844.13 = 545.79/x
  3. Step 3: Cross multiply
    611.40x = 844.13 × 545.79
  4. Step 4: Simplify right side
    611.40x = 460,717.71
  5. Step 5: Solve for x
    x = 460,717.71/611.40
  6. Step 6: Final answer
    x = 753.55

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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.