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Finding the Fourth Proportional to 862.14, 1,189.82 and 530.69

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Solution

The fourth proportional to 862.14, 1,189.82 and 530.69 is: 732.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.14 : 1,189.82 = 530.69 : x
  2. Step 2: Convert to fraction form
    862.14/1,189.82 = 530.69/x
  3. Step 3: Cross multiply
    862.14x = 1,189.82 × 530.69
  4. Step 4: Simplify right side
    862.14x = 631,420.95
  5. Step 5: Solve for x
    x = 631,420.95/862.14
  6. Step 6: Final answer
    x = 732.38

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1.5x scale

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.