Home / 1,187,180.38-1,638,314.70-643,316.02

Finding the Fourth Proportional to 1,187,180.38, 1,638,314.70 and 643,316.02

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Solution

The fourth proportional to 1,187,180.38, 1,638,314.70 and 643,316.02 is: 887,779.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,180.38 : 1,638,314.70 = 643,316.02 : x
  2. Step 2: Convert to fraction form
    1,187,180.38/1,638,314.70 = 643,316.02/x
  3. Step 3: Cross multiply
    1,187,180.38x = 1,638,314.70 × 643,316.02
  4. Step 4: Simplify right side
    1,187,180.38x = 1,053,954,092,311.49
  5. Step 5: Solve for x
    x = 1,053,954,092,311.49/1,187,180.38
  6. Step 6: Final answer
    x = 887,779.24

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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.