Home / 1,005,947.31-1,387,964.29-638,290.39

Finding the Fourth Proportional to 1,005,947.31, 1,387,964.29 and 638,290.39

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Solution

The fourth proportional to 1,005,947.31, 1,387,964.29 and 638,290.39 is: 880,686.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,005,947.31 : 1,387,964.29 = 638,290.39 : x
  2. Step 2: Convert to fraction form
    1,005,947.31/1,387,964.29 = 638,290.39/x
  3. Step 3: Cross multiply
    1,005,947.31x = 1,387,964.29 × 638,290.39
  4. Step 4: Simplify right side
    1,005,947.31x = 885,924,267,970.17
  5. Step 5: Solve for x
    x = 885,924,267,970.17/1,005,947.31
  6. Step 6: Final answer
    x = 880,686.55

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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.