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Finding the Fourth Proportional to 281,140.80, 421,808.40 and 271,420.80

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Solution

The fourth proportional to 281,140.80, 421,808.40 and 271,420.80 is: 407,225.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,140.80 : 421,808.40 = 271,420.80 : x
  2. Step 2: Convert to fraction form
    281,140.80/421,808.40 = 271,420.80/x
  3. Step 3: Cross multiply
    281,140.80x = 421,808.40 × 271,420.80
  4. Step 4: Simplify right side
    281,140.80x = 114,487,573,374.72
  5. Step 5: Solve for x
    x = 114,487,573,374.72/281,140.80
  6. Step 6: Final answer
    x = 407,225.04

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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.