Home / 1,290,776.48-1,781,135.12-717,724.16

Finding the Fourth Proportional to 1,290,776.48, 1,781,135.12 and 717,724.16

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Solution

The fourth proportional to 1,290,776.48, 1,781,135.12 and 717,724.16 is: 990,383.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,776.48 : 1,781,135.12 = 717,724.16 : x
  2. Step 2: Convert to fraction form
    1,290,776.48/1,781,135.12 = 717,724.16/x
  3. Step 3: Cross multiply
    1,290,776.48x = 1,781,135.12 × 717,724.16
  4. Step 4: Simplify right side
    1,290,776.48x = 1,278,363,707,848.50
  5. Step 5: Solve for x
    x = 1,278,363,707,848.50/1,290,776.48
  6. Step 6: Final answer
    x = 990,383.48

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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.