Home / 1,187,293.32-1,638,466.19-643,429.11

Finding the Fourth Proportional to 1,187,293.32, 1,638,466.19 and 643,429.11

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Solution

The fourth proportional to 1,187,293.32, 1,638,466.19 and 643,429.11 is: 887,932.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,293.32 : 1,638,466.19 = 643,429.11 : x
  2. Step 2: Convert to fraction form
    1,187,293.32/1,638,466.19 = 643,429.11/x
  3. Step 3: Cross multiply
    1,187,293.32x = 1,638,466.19 × 643,429.11
  4. Step 4: Simplify right side
    1,187,293.32x = 1,054,236,842,396.79
  5. Step 5: Solve for x
    x = 1,054,236,842,396.79/1,187,293.32
  6. Step 6: Final answer
    x = 887,932.94

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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.