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Finding the Fourth Proportional to 542.64, 749.16 and 418.08

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Solution

The fourth proportional to 542.64, 749.16 and 418.08 is: 577.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.64 : 749.16 = 418.08 : x
  2. Step 2: Convert to fraction form
    542.64/749.16 = 418.08/x
  3. Step 3: Cross multiply
    542.64x = 749.16 × 418.08
  4. Step 4: Simplify right side
    542.64x = 313,208.81
  5. Step 5: Solve for x
    x = 313,208.81/542.64
  6. Step 6: Final answer
    x = 577.19

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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.