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Finding the Fourth Proportional to 260,216.40, 390,335.40 and 82,718.40

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Solution

The fourth proportional to 260,216.40, 390,335.40 and 82,718.40 is: 124,081.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,216.40 : 390,335.40 = 82,718.40 : x
  2. Step 2: Convert to fraction form
    260,216.40/390,335.40 = 82,718.40/x
  3. Step 3: Cross multiply
    260,216.40x = 390,335.40 × 82,718.40
  4. Step 4: Simplify right side
    260,216.40x = 32,287,919,751.36
  5. Step 5: Solve for x
    x = 32,287,919,751.36/260,216.40
  6. Step 6: Final answer
    x = 124,081.03

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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.