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Finding the Fourth Proportional to 625.30, 937.35 and 486.40

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Solution

The fourth proportional to 625.30, 937.35 and 486.40 is: 729.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.30 : 937.35 = 486.40 : x
  2. Step 2: Convert to fraction form
    625.30/937.35 = 486.40/x
  3. Step 3: Cross multiply
    625.30x = 937.35 × 486.40
  4. Step 4: Simplify right side
    625.30x = 455,927.04
  5. Step 5: Solve for x
    x = 455,927.04/625.30
  6. Step 6: Final answer
    x = 729.13

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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.