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Finding the Fourth Proportional to 330,538.86, 455,988.06 and 239,695.56

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Solution

The fourth proportional to 330,538.86, 455,988.06 and 239,695.56 is: 330,667.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,538.86 : 455,988.06 = 239,695.56 : x
  2. Step 2: Convert to fraction form
    330,538.86/455,988.06 = 239,695.56/x
  3. Step 3: Cross multiply
    330,538.86x = 455,988.06 × 239,695.56
  4. Step 4: Simplify right side
    330,538.86x = 109,298,313,395.01
  5. Step 5: Solve for x
    x = 109,298,313,395.01/330,538.86
  6. Step 6: Final answer
    x = 330,667.06

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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.