Home / 1,187,304.39-1,638,481.45-643,440.15

Finding the Fourth Proportional to 1,187,304.39, 1,638,481.45 and 643,440.15

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Solution

The fourth proportional to 1,187,304.39, 1,638,481.45 and 643,440.15 is: 887,948.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,304.39 : 1,638,481.45 = 643,440.15 : x
  2. Step 2: Convert to fraction form
    1,187,304.39/1,638,481.45 = 643,440.15/x
  3. Step 3: Cross multiply
    1,187,304.39x = 1,638,481.45 × 643,440.15
  4. Step 4: Simplify right side
    1,187,304.39x = 1,054,264,749,960.22
  5. Step 5: Solve for x
    x = 1,054,264,749,960.22/1,187,304.39
  6. Step 6: Final answer
    x = 887,948.16

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.