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Finding the Fourth Proportional to 260,380.17, 390,124.35 and 142,134.35

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Solution

The fourth proportional to 260,380.17, 390,124.35 and 142,134.35 is: 212,958.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,380.17 : 390,124.35 = 142,134.35 : x
  2. Step 2: Convert to fraction form
    260,380.17/390,124.35 = 142,134.35/x
  3. Step 3: Cross multiply
    260,380.17x = 390,124.35 × 142,134.35
  4. Step 4: Simplify right side
    260,380.17x = 55,450,068,955.80
  5. Step 5: Solve for x
    x = 55,450,068,955.80/260,380.17
  6. Step 6: Final answer
    x = 212,958.11

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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.