Home / 1,290,258.47-1,780,558.76-717,298.65

Finding the Fourth Proportional to 1,290,258.47, 1,780,558.76 and 717,298.65

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Solution

The fourth proportional to 1,290,258.47, 1,780,558.76 and 717,298.65 is: 989,873.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,258.47 : 1,780,558.76 = 717,298.65 : x
  2. Step 2: Convert to fraction form
    1,290,258.47/1,780,558.76 = 717,298.65/x
  3. Step 3: Cross multiply
    1,290,258.47x = 1,780,558.76 × 717,298.65
  4. Step 4: Simplify right side
    1,290,258.47x = 1,277,192,396,586.92
  5. Step 5: Solve for x
    x = 1,277,192,396,586.92/1,290,258.47
  6. Step 6: Final answer
    x = 989,873.29

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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.