Home / 1,243,612.20-1,866,800.70-770,831.40

Finding the Fourth Proportional to 1,243,612.20, 1,866,800.70 and 770,831.40

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Solution

The fourth proportional to 1,243,612.20, 1,866,800.70 and 770,831.40 is: 1,157,103.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243,612.20 : 1,866,800.70 = 770,831.40 : x
  2. Step 2: Convert to fraction form
    1,243,612.20/1,866,800.70 = 770,831.40/x
  3. Step 3: Cross multiply
    1,243,612.20x = 1,866,800.70 × 770,831.40
  4. Step 4: Simplify right side
    1,243,612.20x = 1,438,988,597,101.98
  5. Step 5: Solve for x
    x = 1,438,988,597,101.98/1,243,612.20
  6. Step 6: Final answer
    x = 1,157,103.96

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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.