Home / 989,919.16-1,363,978.28-667,068.56

Finding the Fourth Proportional to 989,919.16, 1,363,978.28 and 667,068.56

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Solution

The fourth proportional to 989,919.16, 1,363,978.28 and 667,068.56 is: 919,132.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,919.16 : 1,363,978.28 = 667,068.56 : x
  2. Step 2: Convert to fraction form
    989,919.16/1,363,978.28 = 667,068.56/x
  3. Step 3: Cross multiply
    989,919.16x = 1,363,978.28 × 667,068.56
  4. Step 4: Simplify right side
    989,919.16x = 909,867,027,110.88
  5. Step 5: Solve for x
    x = 909,867,027,110.88/989,919.16
  6. Step 6: Final answer
    x = 919,132.66

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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.