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Finding the Fourth Proportional to 615,806.20, 923,579.70 and 260,831.80

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Solution

The fourth proportional to 615,806.20, 923,579.70 and 260,831.80 is: 391,192.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,806.20 : 923,579.70 = 260,831.80 : x
  2. Step 2: Convert to fraction form
    615,806.20/923,579.70 = 260,831.80/x
  3. Step 3: Cross multiply
    615,806.20x = 923,579.70 × 260,831.80
  4. Step 4: Simplify right side
    615,806.20x = 240,898,955,594.46
  5. Step 5: Solve for x
    x = 240,898,955,594.46/615,806.20
  6. Step 6: Final answer
    x = 391,192.81

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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.