Home / 290,378,728.80-400,717,600.35-158,220,811.28

Finding the Fourth Proportional to 290,378,728.80, 400,717,600.35 and 158,220,811.28

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Solution

The fourth proportional to 290,378,728.80, 400,717,600.35 and 158,220,811.28 is: 218,341,970.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,378,728.80 : 400,717,600.35 = 158,220,811.28 : x
  2. Step 2: Convert to fraction form
    290,378,728.80/400,717,600.35 = 158,220,811.28/x
  3. Step 3: Cross multiply
    290,378,728.80x = 400,717,600.35 × 158,220,811.28
  4. Step 4: Simplify right side
    290,378,728.80x = 63,401,863,819,548,232
  5. Step 5: Solve for x
    x = 63,401,863,819,548,232/290,378,728.80
  6. Step 6: Final answer
    x = 218,341,970.44

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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.