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Finding the Fourth Proportional to 421,570.14, 632,604.15 and 155,516.46

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Solution

The fourth proportional to 421,570.14, 632,604.15 and 155,516.46 is: 233,366.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,570.14 : 632,604.15 = 155,516.46 : x
  2. Step 2: Convert to fraction form
    421,570.14/632,604.15 = 155,516.46/x
  3. Step 3: Cross multiply
    421,570.14x = 632,604.15 × 155,516.46
  4. Step 4: Simplify right side
    421,570.14x = 98,380,357,989.31
  5. Step 5: Solve for x
    x = 98,380,357,989.31/421,570.14
  6. Step 6: Final answer
    x = 233,366.52

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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.