Home / 878,412.20-1,317,618.30-815,426.60

Finding the Fourth Proportional to 878,412.20, 1,317,618.30 and 815,426.60

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Solution

The fourth proportional to 878,412.20, 1,317,618.30 and 815,426.60 is: 1,223,139.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,412.20 : 1,317,618.30 = 815,426.60 : x
  2. Step 2: Convert to fraction form
    878,412.20/1,317,618.30 = 815,426.60/x
  3. Step 3: Cross multiply
    878,412.20x = 1,317,618.30 × 815,426.60
  4. Step 4: Simplify right side
    878,412.20x = 1,074,421,010,466.78
  5. Step 5: Solve for x
    x = 1,074,421,010,466.78/878,412.20
  6. Step 6: Final answer
    x = 1,223,139.90

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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.