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Finding the Fourth Proportional to 330,711.98, 456,607.92 and 221,979.39

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Solution

The fourth proportional to 330,711.98, 456,607.92 and 221,979.39 is: 306,482.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,711.98 : 456,607.92 = 221,979.39 : x
  2. Step 2: Convert to fraction form
    330,711.98/456,607.92 = 221,979.39/x
  3. Step 3: Cross multiply
    330,711.98x = 456,607.92 × 221,979.39
  4. Step 4: Simplify right side
    330,711.98x = 101,357,547,550.77
  5. Step 5: Solve for x
    x = 101,357,547,550.77/330,711.98
  6. Step 6: Final answer
    x = 306,482.84

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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.