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Finding the Fourth Proportional to 542.40, 746.64 and 486.24

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Solution

The fourth proportional to 542.40, 746.64 and 486.24 is: 669.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.40 : 746.64 = 486.24 : x
  2. Step 2: Convert to fraction form
    542.40/746.64 = 486.24/x
  3. Step 3: Cross multiply
    542.40x = 746.64 × 486.24
  4. Step 4: Simplify right side
    542.40x = 363,046.23
  5. Step 5: Solve for x
    x = 363,046.23/542.40
  6. Step 6: Final answer
    x = 669.33

Related Problems

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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.