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Finding the Fourth Proportional to 643,259.26, 887,804.04 and 356,871.61

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Solution

The fourth proportional to 643,259.26, 887,804.04 and 356,871.61 is: 492,541.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,259.26 : 887,804.04 = 356,871.61 : x
  2. Step 2: Convert to fraction form
    643,259.26/887,804.04 = 356,871.61/x
  3. Step 3: Cross multiply
    643,259.26x = 887,804.04 × 356,871.61
  4. Step 4: Simplify right side
    643,259.26x = 316,832,057,119.30
  5. Step 5: Solve for x
    x = 316,832,057,119.30/643,259.26
  6. Step 6: Final answer
    x = 492,541.77

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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.