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Finding the Fourth Proportional to 777,794.19, 1,073,442.56 and 491,300.43

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Solution

The fourth proportional to 777,794.19, 1,073,442.56 and 491,300.43 is: 678,049.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,794.19 : 1,073,442.56 = 491,300.43 : x
  2. Step 2: Convert to fraction form
    777,794.19/1,073,442.56 = 491,300.43/x
  3. Step 3: Cross multiply
    777,794.19x = 1,073,442.56 × 491,300.43
  4. Step 4: Simplify right side
    777,794.19x = 527,382,788,851.80
  5. Step 5: Solve for x
    x = 527,382,788,851.80/777,794.19
  6. Step 6: Final answer
    x = 678,049.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.