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Finding the Fourth Proportional to 307,211.78, 423,954.34 and 171,254.36

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Solution

The fourth proportional to 307,211.78, 423,954.34 and 171,254.36 is: 236,332.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,211.78 : 423,954.34 = 171,254.36 : x
  2. Step 2: Convert to fraction form
    307,211.78/423,954.34 = 171,254.36/x
  3. Step 3: Cross multiply
    307,211.78x = 423,954.34 × 171,254.36
  4. Step 4: Simplify right side
    307,211.78x = 72,604,026,618.01
  5. Step 5: Solve for x
    x = 72,604,026,618.01/307,211.78
  6. Step 6: Final answer
    x = 236,332.17

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1.5x scale

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.