Home / 1,189,619-1,641,629.76-645,743.18

Finding the Fourth Proportional to 1,189,619, 1,641,629.76 and 645,743.18

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Solution

The fourth proportional to 1,189,619, 1,641,629.76 and 645,743.18 is: 891,101.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,619 : 1,641,629.76 = 645,743.18 : x
  2. Step 2: Convert to fraction form
    1,189,619/1,641,629.76 = 645,743.18/x
  3. Step 3: Cross multiply
    1,189,619x = 1,641,629.76 × 645,743.18
  4. Step 4: Simplify right side
    1,189,619x = 1,060,071,221,605.04
  5. Step 5: Solve for x
    x = 1,060,071,221,605.04/1,189,619
  6. Step 6: Final answer
    x = 891,101.45

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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.