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Finding the Fourth Proportional to 666,955, 1,000,130.10 and 287,696.80

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Solution

The fourth proportional to 666,955, 1,000,130.10 and 287,696.80 is: 431,414.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,955 : 1,000,130.10 = 287,696.80 : x
  2. Step 2: Convert to fraction form
    666,955/1,000,130.10 = 287,696.80/x
  3. Step 3: Cross multiply
    666,955x = 1,000,130.10 × 287,696.80
  4. Step 4: Simplify right side
    666,955x = 287,734,229,353.68
  5. Step 5: Solve for x
    x = 287,734,229,353.68/666,955
  6. Step 6: Final answer
    x = 431,414.76

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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.