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Finding the Fourth Proportional to 874.47, 1,206.81 and 501.47

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Solution

The fourth proportional to 874.47, 1,206.81 and 501.47 is: 692.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.47 : 1,206.81 = 501.47 : x
  2. Step 2: Convert to fraction form
    874.47/1,206.81 = 501.47/x
  3. Step 3: Cross multiply
    874.47x = 1,206.81 × 501.47
  4. Step 4: Simplify right side
    874.47x = 605,172.98
  5. Step 5: Solve for x
    x = 605,172.98/874.47
  6. Step 6: Final answer
    x = 692.05

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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.