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Finding the Fourth Proportional to 421,578.05, 632,616.21 and 155,525.45

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Solution

The fourth proportional to 421,578.05, 632,616.21 and 155,525.45 is: 233,380.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,578.05 : 632,616.21 = 155,525.45 : x
  2. Step 2: Convert to fraction form
    421,578.05/632,616.21 = 155,525.45/x
  3. Step 3: Cross multiply
    421,578.05x = 632,616.21 × 155,525.45
  4. Step 4: Simplify right side
    421,578.05x = 98,387,917,574.46
  5. Step 5: Solve for x
    x = 98,387,917,574.46/421,578.05
  6. Step 6: Final answer
    x = 233,380.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.