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Finding the Fourth Proportional to 310,979.52, 429,358.32 and 239,232.96

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Solution

The fourth proportional to 310,979.52, 429,358.32 and 239,232.96 is: 330,300.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,979.52 : 429,358.32 = 239,232.96 : x
  2. Step 2: Convert to fraction form
    310,979.52/429,358.32 = 239,232.96/x
  3. Step 3: Cross multiply
    310,979.52x = 429,358.32 × 239,232.96
  4. Step 4: Simplify right side
    310,979.52x = 102,716,661,794.23
  5. Step 5: Solve for x
    x = 102,716,661,794.23/310,979.52
  6. Step 6: Final answer
    x = 330,300.41

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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.