Home / 1,290,220.51-1,780,565.07-717,270.25

Finding the Fourth Proportional to 1,290,220.51, 1,780,565.07 and 717,270.25

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Solution

The fourth proportional to 1,290,220.51, 1,780,565.07 and 717,270.25 is: 989,866.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,220.51 : 1,780,565.07 = 717,270.25 : x
  2. Step 2: Convert to fraction form
    1,290,220.51/1,780,565.07 = 717,270.25/x
  3. Step 3: Cross multiply
    1,290,220.51x = 1,780,565.07 × 717,270.25
  4. Step 4: Simplify right side
    1,290,220.51x = 1,277,146,352,900.17
  5. Step 5: Solve for x
    x = 1,277,146,352,900.17/1,290,220.51
  6. Step 6: Final answer
    x = 989,866.73

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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.