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Finding the Fourth Proportional to 421,571.64, 632,606.40 and 155,517.96

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Solution

The fourth proportional to 421,571.64, 632,606.40 and 155,517.96 is: 233,368.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,571.64 : 632,606.40 = 155,517.96 : x
  2. Step 2: Convert to fraction form
    421,571.64/632,606.40 = 155,517.96/x
  3. Step 3: Cross multiply
    421,571.64x = 632,606.40 × 155,517.96
  4. Step 4: Simplify right side
    421,571.64x = 98,381,656,810.94
  5. Step 5: Solve for x
    x = 98,381,656,810.94/421,571.64
  6. Step 6: Final answer
    x = 233,368.77

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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.