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Finding the Fourth Proportional to 874.76, 1,206.98 and 501.66

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Solution

The fourth proportional to 874.76, 1,206.98 and 501.66 is: 692.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.76 : 1,206.98 = 501.66 : x
  2. Step 2: Convert to fraction form
    874.76/1,206.98 = 501.66/x
  3. Step 3: Cross multiply
    874.76x = 1,206.98 × 501.66
  4. Step 4: Simplify right side
    874.76x = 605,493.59
  5. Step 5: Solve for x
    x = 605,493.59/874.76
  6. Step 6: Final answer
    x = 692.18

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Double scale
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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.