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Finding the Fourth Proportional to 260,285.40, 390,425.40 and 133,961.04

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Solution

The fourth proportional to 260,285.40, 390,425.40 and 133,961.04 is: 200,940.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,285.40 : 390,425.40 = 133,961.04 : x
  2. Step 2: Convert to fraction form
    260,285.40/390,425.40 = 133,961.04/x
  3. Step 3: Cross multiply
    260,285.40x = 390,425.40 × 133,961.04
  4. Step 4: Simplify right side
    260,285.40x = 52,301,792,626.42
  5. Step 5: Solve for x
    x = 52,301,792,626.42/260,285.40
  6. Step 6: Final answer
    x = 200,940.17

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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.