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Finding the Fourth Proportional to 1,697.52, 2,545.20 and 831.36

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Solution

The fourth proportional to 1,697.52, 2,545.20 and 831.36 is: 1,246.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,697.52 : 2,545.20 = 831.36 : x
  2. Step 2: Convert to fraction form
    1,697.52/2,545.20 = 831.36/x
  3. Step 3: Cross multiply
    1,697.52x = 2,545.20 × 831.36
  4. Step 4: Simplify right side
    1,697.52x = 2,115,977.47
  5. Step 5: Solve for x
    x = 2,115,977.47/1,697.52
  6. Step 6: Final answer
    x = 1,246.51

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1.5x scale

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.