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Finding the Fourth Proportional to 330,718.16, 455,581 and 239,806.96

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Solution

The fourth proportional to 330,718.16, 455,581 and 239,806.96 is: 330,346.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,718.16 : 455,581 = 239,806.96 : x
  2. Step 2: Convert to fraction form
    330,718.16/455,581 = 239,806.96/x
  3. Step 3: Cross multiply
    330,718.16x = 455,581 × 239,806.96
  4. Step 4: Simplify right side
    330,718.16x = 109,251,494,643.76
  5. Step 5: Solve for x
    x = 109,251,494,643.76/330,718.16
  6. Step 6: Final answer
    x = 330,346.22

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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.