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Finding the Fourth Proportional to 910.54, 1,366.08 and 424.18

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Solution

The fourth proportional to 910.54, 1,366.08 and 424.18 is: 636.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.54 : 1,366.08 = 424.18 : x
  2. Step 2: Convert to fraction form
    910.54/1,366.08 = 424.18/x
  3. Step 3: Cross multiply
    910.54x = 1,366.08 × 424.18
  4. Step 4: Simplify right side
    910.54x = 579,463.81
  5. Step 5: Solve for x
    x = 579,463.81/910.54
  6. Step 6: Final answer
    x = 636.40

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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.