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Finding the Fourth Proportional to 260,277.20, 390,415.80 and 171,630.80

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Solution

The fourth proportional to 260,277.20, 390,415.80 and 171,630.80 is: 257,446.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,277.20 : 390,415.80 = 171,630.80 : x
  2. Step 2: Convert to fraction form
    260,277.20/390,415.80 = 171,630.80/x
  3. Step 3: Cross multiply
    260,277.20x = 390,415.80 × 171,630.80
  4. Step 4: Simplify right side
    260,277.20x = 67,007,376,086.64
  5. Step 5: Solve for x
    x = 67,007,376,086.64/260,277.20
  6. Step 6: Final answer
    x = 257,446.20

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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.