Home / 1,290,258.52-1,780,455.90-717,263.80

Finding the Fourth Proportional to 1,290,258.52, 1,780,455.90 and 717,263.80

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Solution

The fourth proportional to 1,290,258.52, 1,780,455.90 and 717,263.80 is: 989,767.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,258.52 : 1,780,455.90 = 717,263.80 : x
  2. Step 2: Convert to fraction form
    1,290,258.52/1,780,455.90 = 717,263.80/x
  3. Step 3: Cross multiply
    1,290,258.52x = 1,780,455.90 × 717,263.80
  4. Step 4: Simplify right side
    1,290,258.52x = 1,277,056,560,980.10
  5. Step 5: Solve for x
    x = 1,277,056,560,980.10/1,290,258.52
  6. Step 6: Final answer
    x = 989,767.97

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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.