Home / 1,187,181.38-1,638,316.08-643,317.02

Finding the Fourth Proportional to 1,187,181.38, 1,638,316.08 and 643,317.02

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Solution

The fourth proportional to 1,187,181.38, 1,638,316.08 and 643,317.02 is: 887,780.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,181.38 : 1,638,316.08 = 643,317.02 : x
  2. Step 2: Convert to fraction form
    1,187,181.38/1,638,316.08 = 643,317.02/x
  3. Step 3: Cross multiply
    1,187,181.38x = 1,638,316.08 × 643,317.02
  4. Step 4: Simplify right side
    1,187,181.38x = 1,053,956,618,403.68
  5. Step 5: Solve for x
    x = 1,053,956,618,403.68/1,187,181.38
  6. Step 6: Final answer
    x = 887,780.62

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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.