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Finding the Fourth Proportional to 642,813.44, 887,082.72 and 356,376.32

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Solution

The fourth proportional to 642,813.44, 887,082.72 and 356,376.32 is: 491,799.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,813.44 : 887,082.72 = 356,376.32 : x
  2. Step 2: Convert to fraction form
    642,813.44/887,082.72 = 356,376.32/x
  3. Step 3: Cross multiply
    642,813.44x = 887,082.72 × 356,376.32
  4. Step 4: Simplify right side
    642,813.44x = 316,135,275,289.19
  5. Step 5: Solve for x
    x = 316,135,275,289.19/642,813.44
  6. Step 6: Final answer
    x = 491,799.42

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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.