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Finding the Fourth Proportional to 1,244,763.20, 1,868,527.20 and 771,982.40

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Solution

The fourth proportional to 1,244,763.20, 1,868,527.20 and 771,982.40 is: 1,158,830.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244,763.20 : 1,868,527.20 = 771,982.40 : x
  2. Step 2: Convert to fraction form
    1,244,763.20/1,868,527.20 = 771,982.40/x
  3. Step 3: Cross multiply
    1,244,763.20x = 1,868,527.20 × 771,982.40
  4. Step 4: Simplify right side
    1,244,763.20x = 1,442,470,112,321.28
  5. Step 5: Solve for x
    x = 1,442,470,112,321.28/1,244,763.20
  6. Step 6: Final answer
    x = 1,158,830.94

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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.