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Finding the Fourth Proportional to 281,206.40, 421,809.60 and 181,479.20

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Solution

The fourth proportional to 281,206.40, 421,809.60 and 181,479.20 is: 272,218.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,206.40 : 421,809.60 = 181,479.20 : x
  2. Step 2: Convert to fraction form
    281,206.40/421,809.60 = 181,479.20/x
  3. Step 3: Cross multiply
    281,206.40x = 421,809.60 × 181,479.20
  4. Step 4: Simplify right side
    281,206.40x = 76,549,668,760.32
  5. Step 5: Solve for x
    x = 76,549,668,760.32/281,206.40
  6. Step 6: Final answer
    x = 272,218.80

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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.