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Finding the Fourth Proportional to 643,901.04, 888,576.84 and 357,413.76

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Solution

The fourth proportional to 643,901.04, 888,576.84 and 357,413.76 is: 493,227.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,901.04 : 888,576.84 = 357,413.76 : x
  2. Step 2: Convert to fraction form
    643,901.04/888,576.84 = 357,413.76/x
  3. Step 3: Cross multiply
    643,901.04x = 888,576.84 × 357,413.76
  4. Step 4: Simplify right side
    643,901.04x = 317,589,589,433.32
  5. Step 5: Solve for x
    x = 317,589,589,433.32/643,901.04
  6. Step 6: Final answer
    x = 493,227.33

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Double scale
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Similar ratio
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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.