Home / 1,290,257.04-1,780,615.47-717,306.78

Finding the Fourth Proportional to 1,290,257.04, 1,780,615.47 and 717,306.78

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Solution

The fourth proportional to 1,290,257.04, 1,780,615.47 and 717,306.78 is: 989,917.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,257.04 : 1,780,615.47 = 717,306.78 : x
  2. Step 2: Convert to fraction form
    1,290,257.04/1,780,615.47 = 717,306.78/x
  3. Step 3: Cross multiply
    1,290,257.04x = 1,780,615.47 × 717,306.78
  4. Step 4: Simplify right side
    1,290,257.04x = 1,277,247,549,203.89
  5. Step 5: Solve for x
    x = 1,277,247,549,203.89/1,290,257.04
  6. Step 6: Final answer
    x = 989,917.13

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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.