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Finding the Fourth Proportional to 307,115.52, 423,813.66 and 171,146.47

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Solution

The fourth proportional to 307,115.52, 423,813.66 and 171,146.47 is: 236,178.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,115.52 : 423,813.66 = 171,146.47 : x
  2. Step 2: Convert to fraction form
    307,115.52/423,813.66 = 171,146.47/x
  3. Step 3: Cross multiply
    307,115.52x = 423,813.66 × 171,146.47
  4. Step 4: Simplify right side
    307,115.52x = 72,534,211,846.78
  5. Step 5: Solve for x
    x = 72,534,211,846.78/307,115.52
  6. Step 6: Final answer
    x = 236,178.92

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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.