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Finding the Fourth Proportional to 643,040.28, 887,394.06 and 356,553

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Solution

The fourth proportional to 643,040.28, 887,394.06 and 356,553 is: 492,042.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,040.28 : 887,394.06 = 356,553 : x
  2. Step 2: Convert to fraction form
    643,040.28/887,394.06 = 356,553/x
  3. Step 3: Cross multiply
    643,040.28x = 887,394.06 × 356,553
  4. Step 4: Simplify right side
    643,040.28x = 316,403,014,275.18
  5. Step 5: Solve for x
    x = 316,403,014,275.18/643,040.28
  6. Step 6: Final answer
    x = 492,042.29

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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.