Home / 668,839.90-1,003,259.85-385,404.70

Finding the Fourth Proportional to 668,839.90, 1,003,259.85 and 385,404.70

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Solution

The fourth proportional to 668,839.90, 1,003,259.85 and 385,404.70 is: 578,107.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,839.90 : 1,003,259.85 = 385,404.70 : x
  2. Step 2: Convert to fraction form
    668,839.90/1,003,259.85 = 385,404.70/x
  3. Step 3: Cross multiply
    668,839.90x = 1,003,259.85 × 385,404.70
  4. Step 4: Simplify right side
    668,839.90x = 386,661,061,511.30
  5. Step 5: Solve for x
    x = 386,661,061,511.30/668,839.90
  6. Step 6: Final answer
    x = 578,107.05

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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.