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Finding the Fourth Proportional to 1,641.80, 2,461.75 and 545.87

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Solution

The fourth proportional to 1,641.80, 2,461.75 and 545.87 is: 818.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,641.80 : 2,461.75 = 545.87 : x
  2. Step 2: Convert to fraction form
    1,641.80/2,461.75 = 545.87/x
  3. Step 3: Cross multiply
    1,641.80x = 2,461.75 × 545.87
  4. Step 4: Simplify right side
    1,641.80x = 1,343,795.47
  5. Step 5: Solve for x
    x = 1,343,795.47/1,641.80
  6. Step 6: Final answer
    x = 818.49

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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.