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Finding the Fourth Proportional to 643,152.28, 887,491.56 and 356,671.48

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Solution

The fourth proportional to 643,152.28, 887,491.56 and 356,671.48 is: 492,174.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,152.28 : 887,491.56 = 356,671.48 : x
  2. Step 2: Convert to fraction form
    643,152.28/887,491.56 = 356,671.48/x
  3. Step 3: Cross multiply
    643,152.28x = 887,491.56 × 356,671.48
  4. Step 4: Simplify right side
    643,152.28x = 316,542,928,192.71
  5. Step 5: Solve for x
    x = 316,542,928,192.71/643,152.28
  6. Step 6: Final answer
    x = 492,174.15

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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.