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Finding the Fourth Proportional to 643,624.52, 888,374.15 and 401,761.46

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Solution

The fourth proportional to 643,624.52, 888,374.15 and 401,761.46 is: 554,538.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,624.52 : 888,374.15 = 401,761.46 : x
  2. Step 2: Convert to fraction form
    643,624.52/888,374.15 = 401,761.46/x
  3. Step 3: Cross multiply
    643,624.52x = 888,374.15 × 401,761.46
  4. Step 4: Simplify right side
    643,624.52x = 356,914,495,530.26
  5. Step 5: Solve for x
    x = 356,914,495,530.26/643,624.52
  6. Step 6: Final answer
    x = 554,538.38

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1.5x scale

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.