Home / 1,312,859.40-1,969,289.10-1,123,902.60

Finding the Fourth Proportional to 1,312,859.40, 1,969,289.10 and 1,123,902.60

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Solution

The fourth proportional to 1,312,859.40, 1,969,289.10 and 1,123,902.60 is: 1,685,853.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,859.40 : 1,969,289.10 = 1,123,902.60 : x
  2. Step 2: Convert to fraction form
    1,312,859.40/1,969,289.10 = 1,123,902.60/x
  3. Step 3: Cross multiply
    1,312,859.40x = 1,969,289.10 × 1,123,902.60
  4. Step 4: Simplify right side
    1,312,859.40x = 2,213,289,139,641.66
  5. Step 5: Solve for x
    x = 2,213,289,139,641.66/1,312,859.40
  6. Step 6: Final answer
    x = 1,685,853.90

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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.