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Finding the Fourth Proportional to 861.84, 1,189.37 and 530.37

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Solution

The fourth proportional to 861.84, 1,189.37 and 530.37 is: 731.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    861.84 : 1,189.37 = 530.37 : x
  2. Step 2: Convert to fraction form
    861.84/1,189.37 = 530.37/x
  3. Step 3: Cross multiply
    861.84x = 1,189.37 × 530.37
  4. Step 4: Simplify right side
    861.84x = 630,806.17
  5. Step 5: Solve for x
    x = 630,806.17/861.84
  6. Step 6: Final answer
    x = 731.93

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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.