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Finding the Fourth Proportional to 260,622.48, 390,940.55 and 89,842.39

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Solution

The fourth proportional to 260,622.48, 390,940.55 and 89,842.39 is: 134,765.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,622.48 : 390,940.55 = 89,842.39 : x
  2. Step 2: Convert to fraction form
    260,622.48/390,940.55 = 89,842.39/x
  3. Step 3: Cross multiply
    260,622.48x = 390,940.55 × 89,842.39
  4. Step 4: Simplify right side
    260,622.48x = 35,123,031,405.21
  5. Step 5: Solve for x
    x = 35,123,031,405.21/260,622.48
  6. Step 6: Final answer
    x = 134,765.93

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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.