Home / 1,319,246.10-1,978,869.15-420,680.70

Finding the Fourth Proportional to 1,319,246.10, 1,978,869.15 and 420,680.70

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Solution

The fourth proportional to 1,319,246.10, 1,978,869.15 and 420,680.70 is: 631,021.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,246.10 : 1,978,869.15 = 420,680.70 : x
  2. Step 2: Convert to fraction form
    1,319,246.10/1,978,869.15 = 420,680.70/x
  3. Step 3: Cross multiply
    1,319,246.10x = 1,978,869.15 × 420,680.70
  4. Step 4: Simplify right side
    1,319,246.10x = 832,472,059,230.41
  5. Step 5: Solve for x
    x = 832,472,059,230.41/1,319,246.10
  6. Step 6: Final answer
    x = 631,021.05

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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.