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Finding the Fourth Proportional to 421,362.16, 632,292.70 and 155,309.56

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Solution

The fourth proportional to 421,362.16, 632,292.70 and 155,309.56 is: 233,056.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,362.16 : 632,292.70 = 155,309.56 : x
  2. Step 2: Convert to fraction form
    421,362.16/632,292.70 = 155,309.56/x
  3. Step 3: Cross multiply
    421,362.16x = 632,292.70 × 155,309.56
  4. Step 4: Simplify right side
    421,362.16x = 98,201,101,028.21
  5. Step 5: Solve for x
    x = 98,201,101,028.21/421,362.16
  6. Step 6: Final answer
    x = 233,056.29

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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.