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Finding the Fourth Proportional to 421,458.16, 632,436.72 and 155,405.92

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Solution

The fourth proportional to 421,458.16, 632,436.72 and 155,405.92 is: 233,200.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,458.16 : 632,436.72 = 155,405.92 : x
  2. Step 2: Convert to fraction form
    421,458.16/632,436.72 = 155,405.92/x
  3. Step 3: Cross multiply
    421,458.16x = 632,436.72 × 155,405.92
  4. Step 4: Simplify right side
    421,458.16x = 98,284,410,313.38
  5. Step 5: Solve for x
    x = 98,284,410,313.38/421,458.16
  6. Step 6: Final answer
    x = 233,200.87

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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.