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Finding the Fourth Proportional to 421,479.37, 632,468.17 and 155,426.72

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Solution

The fourth proportional to 421,479.37, 632,468.17 and 155,426.72 is: 233,231.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,479.37 : 632,468.17 = 155,426.72 : x
  2. Step 2: Convert to fraction form
    421,479.37/632,468.17 = 155,426.72/x
  3. Step 3: Cross multiply
    421,479.37x = 632,468.17 × 155,426.72
  4. Step 4: Simplify right side
    421,479.37x = 98,302,455,973.03
  5. Step 5: Solve for x
    x = 98,302,455,973.03/421,479.37
  6. Step 6: Final answer
    x = 233,231.95

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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.