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Finding the Fourth Proportional to 260,386.54, 390,654.69 and 82,920.94

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Solution

The fourth proportional to 260,386.54, 390,654.69 and 82,920.94 is: 124,405.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,386.54 : 390,654.69 = 82,920.94 : x
  2. Step 2: Convert to fraction form
    260,386.54/390,654.69 = 82,920.94/x
  3. Step 3: Cross multiply
    260,386.54x = 390,654.69 × 82,920.94
  4. Step 4: Simplify right side
    260,386.54x = 32,393,454,110.21
  5. Step 5: Solve for x
    x = 32,393,454,110.21/260,386.54
  6. Step 6: Final answer
    x = 124,405.26

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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.