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Finding the Fourth Proportional to 901.05, 1,243.49 and 497.30

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Solution

The fourth proportional to 901.05, 1,243.49 and 497.30 is: 686.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.05 : 1,243.49 = 497.30 : x
  2. Step 2: Convert to fraction form
    901.05/1,243.49 = 497.30/x
  3. Step 3: Cross multiply
    901.05x = 1,243.49 × 497.30
  4. Step 4: Simplify right side
    901.05x = 618,387.58
  5. Step 5: Solve for x
    x = 618,387.58/901.05
  6. Step 6: Final answer
    x = 686.30

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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.