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Finding the Fourth Proportional to 260,449.40, 390,090.90 and 213,793.40

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Solution

The fourth proportional to 260,449.40, 390,090.90 and 213,793.40 is: 320,211.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,449.40 : 390,090.90 = 213,793.40 : x
  2. Step 2: Convert to fraction form
    260,449.40/390,090.90 = 213,793.40/x
  3. Step 3: Cross multiply
    260,449.40x = 390,090.90 × 213,793.40
  4. Step 4: Simplify right side
    260,449.40x = 83,398,859,820.06
  5. Step 5: Solve for x
    x = 83,398,859,820.06/260,449.40
  6. Step 6: Final answer
    x = 320,211.37

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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.