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Finding the Fourth Proportional to 874.07, 1,206.39 and 501.30

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Solution

The fourth proportional to 874.07, 1,206.39 and 501.30 is: 691.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.07 : 1,206.39 = 501.30 : x
  2. Step 2: Convert to fraction form
    874.07/1,206.39 = 501.30/x
  3. Step 3: Cross multiply
    874.07x = 1,206.39 × 501.30
  4. Step 4: Simplify right side
    874.07x = 604,769.08
  5. Step 5: Solve for x
    x = 604,769.08/874.07
  6. Step 6: Final answer
    x = 691.90

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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.