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Finding the Fourth Proportional to 910.25, 1,364.49 and 493.92

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Solution

The fourth proportional to 910.25, 1,364.49 and 493.92 is: 740.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.25 : 1,364.49 = 493.92 : x
  2. Step 2: Convert to fraction form
    910.25/1,364.49 = 493.92/x
  3. Step 3: Cross multiply
    910.25x = 1,364.49 × 493.92
  4. Step 4: Simplify right side
    910.25x = 673,948.90
  5. Step 5: Solve for x
    x = 673,948.90/910.25
  6. Step 6: Final answer
    x = 740.40

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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.