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Finding the Fourth Proportional to 580,856.80, 871,328.40 and 206,831.20

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Solution

The fourth proportional to 580,856.80, 871,328.40 and 206,831.20 is: 310,262.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    580,856.80 : 871,328.40 = 206,831.20 : x
  2. Step 2: Convert to fraction form
    580,856.80/871,328.40 = 206,831.20/x
  3. Step 3: Cross multiply
    580,856.80x = 871,328.40 × 206,831.20
  4. Step 4: Simplify right side
    580,856.80x = 180,217,898,566.08
  5. Step 5: Solve for x
    x = 180,217,898,566.08/580,856.80
  6. Step 6: Final answer
    x = 310,262.18

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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.