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Finding the Fourth Proportional to 1,545.45, 2,133.63 and 956.79

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Solution

The fourth proportional to 1,545.45, 2,133.63 and 956.79 is: 1,320.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.45 : 2,133.63 = 956.79 : x
  2. Step 2: Convert to fraction form
    1,545.45/2,133.63 = 956.79/x
  3. Step 3: Cross multiply
    1,545.45x = 2,133.63 × 956.79
  4. Step 4: Simplify right side
    1,545.45x = 2,041,435.85
  5. Step 5: Solve for x
    x = 2,041,435.85/1,545.45
  6. Step 6: Final answer
    x = 1,320.93

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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.