Home / 780,965,749.74-1,077,729,778.17-428,547,638.10

Finding the Fourth Proportional to 780,965,749.74, 1,077,729,778.17 and 428,547,638.10

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Solution

The fourth proportional to 780,965,749.74, 1,077,729,778.17 and 428,547,638.10 is: 591,394,118.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,965,749.74 : 1,077,729,778.17 = 428,547,638.10 : x
  2. Step 2: Convert to fraction form
    780,965,749.74/1,077,729,778.17 = 428,547,638.10/x
  3. Step 3: Cross multiply
    780,965,749.74x = 1,077,729,778.17 × 428,547,638.10
  4. Step 4: Simplify right side
    780,965,749.74x = 461,858,550,944,790,528
  5. Step 5: Solve for x
    x = 461,858,550,944,790,528/780,965,749.74
  6. Step 6: Final answer
    x = 591,394,118.24

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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.