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Finding the Fourth Proportional to 421,588.30, 632,631.59 and 155,535.70

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Solution

The fourth proportional to 421,588.30, 632,631.59 and 155,535.70 is: 233,395.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,588.30 : 632,631.59 = 155,535.70 : x
  2. Step 2: Convert to fraction form
    421,588.30/632,631.59 = 155,535.70/x
  3. Step 3: Cross multiply
    421,588.30x = 632,631.59 × 155,535.70
  4. Step 4: Simplify right side
    421,588.30x = 98,396,793,251.93
  5. Step 5: Solve for x
    x = 98,396,793,251.93/421,588.30
  6. Step 6: Final answer
    x = 233,395.46

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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.