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Finding the Fourth Proportional to 542.37, 812.61 and 434.82

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Solution

The fourth proportional to 542.37, 812.61 and 434.82 is: 651.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.37 : 812.61 = 434.82 : x
  2. Step 2: Convert to fraction form
    542.37/812.61 = 434.82/x
  3. Step 3: Cross multiply
    542.37x = 812.61 × 434.82
  4. Step 4: Simplify right side
    542.37x = 353,339.08
  5. Step 5: Solve for x
    x = 353,339.08/542.37
  6. Step 6: Final answer
    x = 651.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.