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Finding the Fourth Proportional to 876,621.40, 1,314,932.10 and 343,868.20

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Solution

The fourth proportional to 876,621.40, 1,314,932.10 and 343,868.20 is: 515,802.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,621.40 : 1,314,932.10 = 343,868.20 : x
  2. Step 2: Convert to fraction form
    876,621.40/1,314,932.10 = 343,868.20/x
  3. Step 3: Cross multiply
    876,621.40x = 1,314,932.10 × 343,868.20
  4. Step 4: Simplify right side
    876,621.40x = 452,163,334,349.22
  5. Step 5: Solve for x
    x = 452,163,334,349.22/876,621.40
  6. Step 6: Final answer
    x = 515,802.30

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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.