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Finding the Fourth Proportional to 315,425.39, 473,021.21 and 112,989.95

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Solution

The fourth proportional to 315,425.39, 473,021.21 and 112,989.95 is: 169,443.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,425.39 : 473,021.21 = 112,989.95 : x
  2. Step 2: Convert to fraction form
    315,425.39/473,021.21 = 112,989.95/x
  3. Step 3: Cross multiply
    315,425.39x = 473,021.21 × 112,989.95
  4. Step 4: Simplify right side
    315,425.39x = 53,446,639,936.78
  5. Step 5: Solve for x
    x = 53,446,639,936.78/315,425.39
  6. Step 6: Final answer
    x = 169,443.05

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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.