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Finding the Fourth Proportional to 1,545.37, 2,132.94 and 907.72

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Solution

The fourth proportional to 1,545.37, 2,132.94 and 907.72 is: 1,252.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.37 : 2,132.94 = 907.72 : x
  2. Step 2: Convert to fraction form
    1,545.37/2,132.94 = 907.72/x
  3. Step 3: Cross multiply
    1,545.37x = 2,132.94 × 907.72
  4. Step 4: Simplify right side
    1,545.37x = 1,936,112.30
  5. Step 5: Solve for x
    x = 1,936,112.30/1,545.37
  6. Step 6: Final answer
    x = 1,252.85

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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.