Home / 1,290,116.16-1,780,145.10-717,078.42

Finding the Fourth Proportional to 1,290,116.16, 1,780,145.10 and 717,078.42

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Solution

The fourth proportional to 1,290,116.16, 1,780,145.10 and 717,078.42 is: 989,448.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,116.16 : 1,780,145.10 = 717,078.42 : x
  2. Step 2: Convert to fraction form
    1,290,116.16/1,780,145.10 = 717,078.42/x
  3. Step 3: Cross multiply
    1,290,116.16x = 1,780,145.10 × 717,078.42
  4. Step 4: Simplify right side
    1,290,116.16x = 1,276,503,635,678.74
  5. Step 5: Solve for x
    x = 1,276,503,635,678.74/1,290,116.16
  6. Step 6: Final answer
    x = 989,448.61

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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.