Home / 1,243,602.20-1,866,785.70-770,821.40

Finding the Fourth Proportional to 1,243,602.20, 1,866,785.70 and 770,821.40

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Solution

The fourth proportional to 1,243,602.20, 1,866,785.70 and 770,821.40 is: 1,157,088.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243,602.20 : 1,866,785.70 = 770,821.40 : x
  2. Step 2: Convert to fraction form
    1,243,602.20/1,866,785.70 = 770,821.40/x
  3. Step 3: Cross multiply
    1,243,602.20x = 1,866,785.70 × 770,821.40
  4. Step 4: Simplify right side
    1,243,602.20x = 1,438,958,366,773.98
  5. Step 5: Solve for x
    x = 1,438,958,366,773.98/1,243,602.20
  6. Step 6: Final answer
    x = 1,157,088.95

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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.