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Finding the Fourth Proportional to 280,848.60, 421,272.90 and 140,556.60

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Solution

The fourth proportional to 280,848.60, 421,272.90 and 140,556.60 is: 210,834.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,848.60 : 421,272.90 = 140,556.60 : x
  2. Step 2: Convert to fraction form
    280,848.60/421,272.90 = 140,556.60/x
  3. Step 3: Cross multiply
    280,848.60x = 421,272.90 × 140,556.60
  4. Step 4: Simplify right side
    280,848.60x = 59,212,686,496.14
  5. Step 5: Solve for x
    x = 59,212,686,496.14/280,848.60
  6. Step 6: Final answer
    x = 210,834.90

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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.