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Finding the Fourth Proportional to 643,224.16, 887,703.84 and 356,836.50

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Solution

The fourth proportional to 643,224.16, 887,703.84 and 356,836.50 is: 492,464.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,224.16 : 887,703.84 = 356,836.50 : x
  2. Step 2: Convert to fraction form
    643,224.16/887,703.84 = 356,836.50/x
  3. Step 3: Cross multiply
    643,224.16x = 887,703.84 × 356,836.50
  4. Step 4: Simplify right side
    643,224.16x = 316,765,131,302.16
  5. Step 5: Solve for x
    x = 316,765,131,302.16/643,224.16
  6. Step 6: Final answer
    x = 492,464.60

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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.