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Finding the Fourth Proportional to 589.62, 812.40 and 549.48

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Solution

The fourth proportional to 589.62, 812.40 and 549.48 is: 757.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.62 : 812.40 = 549.48 : x
  2. Step 2: Convert to fraction form
    589.62/812.40 = 549.48/x
  3. Step 3: Cross multiply
    589.62x = 812.40 × 549.48
  4. Step 4: Simplify right side
    589.62x = 446,397.55
  5. Step 5: Solve for x
    x = 446,397.55/589.62
  6. Step 6: Final answer
    x = 757.09

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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.