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Finding the Fourth Proportional to 3,545.79, 4,890.42 and 3,079.23

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Solution

The fourth proportional to 3,545.79, 4,890.42 and 3,079.23 is: 4,246.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,545.79 : 4,890.42 = 3,079.23 : x
  2. Step 2: Convert to fraction form
    3,545.79/4,890.42 = 3,079.23/x
  3. Step 3: Cross multiply
    3,545.79x = 4,890.42 × 3,079.23
  4. Step 4: Simplify right side
    3,545.79x = 15,058,727.98
  5. Step 5: Solve for x
    x = 15,058,727.98/3,545.79
  6. Step 6: Final answer
    x = 4,246.93

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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.