Home / 643,048.30-887,363.40-356,557.78

Finding the Fourth Proportional to 643,048.30, 887,363.40 and 356,557.78

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Solution

The fourth proportional to 643,048.30, 887,363.40 and 356,557.78 is: 492,025.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,048.30 : 887,363.40 = 356,557.78 : x
  2. Step 2: Convert to fraction form
    643,048.30/887,363.40 = 356,557.78/x
  3. Step 3: Cross multiply
    643,048.30x = 887,363.40 × 356,557.78
  4. Step 4: Simplify right side
    643,048.30x = 316,396,323,957.25
  5. Step 5: Solve for x
    x = 316,396,323,957.25/643,048.30
  6. Step 6: Final answer
    x = 492,025.75

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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.