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Finding the Fourth Proportional to 876,642.80, 1,314,964.20 and 699,495.80

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Solution

The fourth proportional to 876,642.80, 1,314,964.20 and 699,495.80 is: 1,049,243.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,642.80 : 1,314,964.20 = 699,495.80 : x
  2. Step 2: Convert to fraction form
    876,642.80/1,314,964.20 = 699,495.80/x
  3. Step 3: Cross multiply
    876,642.80x = 1,314,964.20 × 699,495.80
  4. Step 4: Simplify right side
    876,642.80x = 919,811,935,050.36
  5. Step 5: Solve for x
    x = 919,811,935,050.36/876,642.80
  6. Step 6: Final answer
    x = 1,049,243.70

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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.