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Finding the Fourth Proportional to 680,918.40, 1,019,822.40 and 400,982.40

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Solution

The fourth proportional to 680,918.40, 1,019,822.40 and 400,982.40 is: 600,557.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,918.40 : 1,019,822.40 = 400,982.40 : x
  2. Step 2: Convert to fraction form
    680,918.40/1,019,822.40 = 400,982.40/x
  3. Step 3: Cross multiply
    680,918.40x = 1,019,822.40 × 400,982.40
  4. Step 4: Simplify right side
    680,918.40x = 408,930,833,525.76
  5. Step 5: Solve for x
    x = 408,930,833,525.76/680,918.40
  6. Step 6: Final answer
    x = 600,557.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.