Home / 1,243,442.20-1,866,545.70-770,661.40

Finding the Fourth Proportional to 1,243,442.20, 1,866,545.70 and 770,661.40

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Solution

The fourth proportional to 1,243,442.20, 1,866,545.70 and 770,661.40 is: 1,156,848.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243,442.20 : 1,866,545.70 = 770,661.40 : x
  2. Step 2: Convert to fraction form
    1,243,442.20/1,866,545.70 = 770,661.40/x
  3. Step 3: Cross multiply
    1,243,442.20x = 1,866,545.70 × 770,661.40
  4. Step 4: Simplify right side
    1,243,442.20x = 1,438,474,722,325.98
  5. Step 5: Solve for x
    x = 1,438,474,722,325.98/1,243,442.20
  6. Step 6: Final answer
    x = 1,156,848.88

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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.