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Finding the Fourth Proportional to 307,312.36, 424,052.58 and 171,313

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Solution

The fourth proportional to 307,312.36, 424,052.58 and 171,313 is: 236,390.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,312.36 : 424,052.58 = 171,313 : x
  2. Step 2: Convert to fraction form
    307,312.36/424,052.58 = 171,313/x
  3. Step 3: Cross multiply
    307,312.36x = 424,052.58 × 171,313
  4. Step 4: Simplify right side
    307,312.36x = 72,645,719,637.54
  5. Step 5: Solve for x
    x = 72,645,719,637.54/307,312.36
  6. Step 6: Final answer
    x = 236,390.49

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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.