Home / 1,078,187.20-1,618,447.20-679,278.40

Finding the Fourth Proportional to 1,078,187.20, 1,618,447.20 and 679,278.40

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Solution

The fourth proportional to 1,078,187.20, 1,618,447.20 and 679,278.40 is: 1,019,652.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078,187.20 : 1,618,447.20 = 679,278.40 : x
  2. Step 2: Convert to fraction form
    1,078,187.20/1,618,447.20 = 679,278.40/x
  3. Step 3: Cross multiply
    1,078,187.20x = 1,618,447.20 × 679,278.40
  4. Step 4: Simplify right side
    1,078,187.20x = 1,099,376,224,500.48
  5. Step 5: Solve for x
    x = 1,099,376,224,500.48/1,078,187.20
  6. Step 6: Final answer
    x = 1,019,652.45

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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.