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Finding the Fourth Proportional to 281,206.60, 421,809.90 and 259,555.30

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Solution

The fourth proportional to 281,206.60, 421,809.90 and 259,555.30 is: 389,332.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,206.60 : 421,809.90 = 259,555.30 : x
  2. Step 2: Convert to fraction form
    281,206.60/421,809.90 = 259,555.30/x
  3. Step 3: Cross multiply
    281,206.60x = 421,809.90 × 259,555.30
  4. Step 4: Simplify right side
    281,206.60x = 109,482,995,137.47
  5. Step 5: Solve for x
    x = 109,482,995,137.47/281,206.60
  6. Step 6: Final answer
    x = 389,332.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.