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Finding the Fourth Proportional to 306,998.71, 423,671.28 and 171,032.57

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Solution

The fourth proportional to 306,998.71, 423,671.28 and 171,032.57 is: 236,032.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,998.71 : 423,671.28 = 171,032.57 : x
  2. Step 2: Convert to fraction form
    306,998.71/423,671.28 = 171,032.57/x
  3. Step 3: Cross multiply
    306,998.71x = 423,671.28 × 171,032.57
  4. Step 4: Simplify right side
    306,998.71x = 72,461,587,853.59
  5. Step 5: Solve for x
    x = 72,461,587,853.59/306,998.71
  6. Step 6: Final answer
    x = 236,032.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.