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Finding the Fourth Proportional to 1,642.15, 2,461.65 and 545.75

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Solution

The fourth proportional to 1,642.15, 2,461.65 and 545.75 is: 818.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,642.15 : 2,461.65 = 545.75 : x
  2. Step 2: Convert to fraction form
    1,642.15/2,461.65 = 545.75/x
  3. Step 3: Cross multiply
    1,642.15x = 2,461.65 × 545.75
  4. Step 4: Simplify right side
    1,642.15x = 1,343,445.49
  5. Step 5: Solve for x
    x = 1,343,445.49/1,642.15
  6. Step 6: Final answer
    x = 818.10

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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.