Home / 1,245,315.40-1,867,973.10-1,123,280.80

Finding the Fourth Proportional to 1,245,315.40, 1,867,973.10 and 1,123,280.80

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Solution

The fourth proportional to 1,245,315.40, 1,867,973.10 and 1,123,280.80 is: 1,684,921.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,315.40 : 1,867,973.10 = 1,123,280.80 : x
  2. Step 2: Convert to fraction form
    1,245,315.40/1,867,973.10 = 1,123,280.80/x
  3. Step 3: Cross multiply
    1,245,315.40x = 1,867,973.10 × 1,123,280.80
  4. Step 4: Simplify right side
    1,245,315.40x = 2,098,258,318,146.48
  5. Step 5: Solve for x
    x = 2,098,258,318,146.48/1,245,315.40
  6. Step 6: Final answer
    x = 1,684,921.20

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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.