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Finding the Fourth Proportional to 260,217.56, 390,128.55 and 180,042.40

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Solution

The fourth proportional to 260,217.56, 390,128.55 and 180,042.40 is: 269,926.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,217.56 : 390,128.55 = 180,042.40 : x
  2. Step 2: Convert to fraction form
    260,217.56/390,128.55 = 180,042.40/x
  3. Step 3: Cross multiply
    260,217.56x = 390,128.55 × 180,042.40
  4. Step 4: Simplify right side
    260,217.56x = 70,239,679,081.29
  5. Step 5: Solve for x
    x = 70,239,679,081.29/260,217.56
  6. Step 6: Final answer
    x = 269,926.74

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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.