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Finding the Fourth Proportional to 281,308.50, 421,819.20 and 91,646.91

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Solution

The fourth proportional to 281,308.50, 421,819.20 and 91,646.91 is: 137,423.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,308.50 : 421,819.20 = 91,646.91 : x
  2. Step 2: Convert to fraction form
    281,308.50/421,819.20 = 91,646.91/x
  3. Step 3: Cross multiply
    281,308.50x = 421,819.20 × 91,646.91
  4. Step 4: Simplify right side
    281,308.50x = 38,658,426,258.67
  5. Step 5: Solve for x
    x = 38,658,426,258.67/281,308.50
  6. Step 6: Final answer
    x = 137,423.60

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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.