Home / 290,378,728.29-400,717,599.66-158,220,810.78

Finding the Fourth Proportional to 290,378,728.29, 400,717,599.66 and 158,220,810.78

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Solution

The fourth proportional to 290,378,728.29, 400,717,599.66 and 158,220,810.78 is: 218,341,969.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,378,728.29 : 400,717,599.66 = 158,220,810.78 : x
  2. Step 2: Convert to fraction form
    290,378,728.29/400,717,599.66 = 158,220,810.78/x
  3. Step 3: Cross multiply
    290,378,728.29x = 400,717,599.66 × 158,220,810.78
  4. Step 4: Simplify right side
    290,378,728.29x = 63,401,863,512,020,656
  5. Step 5: Solve for x
    x = 63,401,863,512,020,656/290,378,728.29
  6. Step 6: Final answer
    x = 218,341,969.76

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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.