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Finding the Fourth Proportional to 876,685.80, 1,315,028.70 and 699,538.80

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Solution

The fourth proportional to 876,685.80, 1,315,028.70 and 699,538.80 is: 1,049,308.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,685.80 : 1,315,028.70 = 699,538.80 : x
  2. Step 2: Convert to fraction form
    876,685.80/1,315,028.70 = 699,538.80/x
  3. Step 3: Cross multiply
    876,685.80x = 1,315,028.70 × 699,538.80
  4. Step 4: Simplify right side
    876,685.80x = 919,913,598,763.56
  5. Step 5: Solve for x
    x = 919,913,598,763.56/876,685.80
  6. Step 6: Final answer
    x = 1,049,308.20

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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.