Home / 1,005,947.80-1,387,964.97-638,290.89

Finding the Fourth Proportional to 1,005,947.80, 1,387,964.97 and 638,290.89

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Solution

The fourth proportional to 1,005,947.80, 1,387,964.97 and 638,290.89 is: 880,687.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,005,947.80 : 1,387,964.97 = 638,290.89 : x
  2. Step 2: Convert to fraction form
    1,005,947.80/1,387,964.97 = 638,290.89/x
  3. Step 3: Cross multiply
    1,005,947.80x = 1,387,964.97 × 638,290.89
  4. Step 4: Simplify right side
    1,005,947.80x = 885,925,395,990.12
  5. Step 5: Solve for x
    x = 885,925,395,990.12/1,005,947.80
  6. Step 6: Final answer
    x = 880,687.25

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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.