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Finding the Fourth Proportional to 312,455.48, 431,185.48 and 176,489.08

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Solution

The fourth proportional to 312,455.48, 431,185.48 and 176,489.08 is: 243,553.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,455.48 : 431,185.48 = 176,489.08 : x
  2. Step 2: Convert to fraction form
    312,455.48/431,185.48 = 176,489.08/x
  3. Step 3: Cross multiply
    312,455.48x = 431,185.48 × 176,489.08
  4. Step 4: Simplify right side
    312,455.48x = 76,099,527,155.37
  5. Step 5: Solve for x
    x = 76,099,527,155.37/312,455.48
  6. Step 6: Final answer
    x = 243,553.19

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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.