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Finding the Fourth Proportional to 908.60, 1,253.86 and 510.26

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Solution

The fourth proportional to 908.60, 1,253.86 and 510.26 is: 704.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.60 : 1,253.86 = 510.26 : x
  2. Step 2: Convert to fraction form
    908.60/1,253.86 = 510.26/x
  3. Step 3: Cross multiply
    908.60x = 1,253.86 × 510.26
  4. Step 4: Simplify right side
    908.60x = 639,787.06
  5. Step 5: Solve for x
    x = 639,787.06/908.60
  6. Step 6: Final answer
    x = 704.15

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Double scale
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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.