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Finding the Fourth Proportional to 667,312.80, 998,636.40 and 611,325.60

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Solution

The fourth proportional to 667,312.80, 998,636.40 and 611,325.60 is: 914,851.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,312.80 : 998,636.40 = 611,325.60 : x
  2. Step 2: Convert to fraction form
    667,312.80/998,636.40 = 611,325.60/x
  3. Step 3: Cross multiply
    667,312.80x = 998,636.40 × 611,325.60
  4. Step 4: Simplify right side
    667,312.80x = 610,491,996,411.84
  5. Step 5: Solve for x
    x = 610,491,996,411.84/667,312.80
  6. Step 6: Final answer
    x = 914,851.32

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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.