Home / 1,290,643.79-1,781,089.91-717,671.66

Finding the Fourth Proportional to 1,290,643.79, 1,781,089.91 and 717,671.66

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Solution

The fourth proportional to 1,290,643.79, 1,781,089.91 and 717,671.66 is: 990,387.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,643.79 : 1,781,089.91 = 717,671.66 : x
  2. Step 2: Convert to fraction form
    1,290,643.79/1,781,089.91 = 717,671.66/x
  3. Step 3: Cross multiply
    1,290,643.79x = 1,781,089.91 × 717,671.66
  4. Step 4: Simplify right side
    1,290,643.79x = 1,278,237,739,825.14
  5. Step 5: Solve for x
    x = 1,278,237,739,825.14/1,290,643.79
  6. Step 6: Final answer
    x = 990,387.71

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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.