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Finding the Fourth Proportional to 1,117.20, 1,541.17 and 907.62

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Solution

The fourth proportional to 1,117.20, 1,541.17 and 907.62 is: 1,252.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.20 : 1,541.17 = 907.62 : x
  2. Step 2: Convert to fraction form
    1,117.20/1,541.17 = 907.62/x
  3. Step 3: Cross multiply
    1,117.20x = 1,541.17 × 907.62
  4. Step 4: Simplify right side
    1,117.20x = 1,398,796.72
  5. Step 5: Solve for x
    x = 1,398,796.72/1,117.20
  6. Step 6: Final answer
    x = 1,252.06

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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.