Home / 1,427,389.12-1,969,951.62-911,616.76

Finding the Fourth Proportional to 1,427,389.12, 1,969,951.62 and 911,616.76

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Solution

The fourth proportional to 1,427,389.12, 1,969,951.62 and 911,616.76 is: 1,258,129.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427,389.12 : 1,969,951.62 = 911,616.76 : x
  2. Step 2: Convert to fraction form
    1,427,389.12/1,969,951.62 = 911,616.76/x
  3. Step 3: Cross multiply
    1,427,389.12x = 1,969,951.62 × 911,616.76
  4. Step 4: Simplify right side
    1,427,389.12x = 1,795,840,913,181.15
  5. Step 5: Solve for x
    x = 1,795,840,913,181.15/1,427,389.12
  6. Step 6: Final answer
    x = 1,258,129.89

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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.