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Finding the Fourth Proportional to 260,035.60, 390,053.40 and 218,045.20

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Solution

The fourth proportional to 260,035.60, 390,053.40 and 218,045.20 is: 327,067.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,035.60 : 390,053.40 = 218,045.20 : x
  2. Step 2: Convert to fraction form
    260,035.60/390,053.40 = 218,045.20/x
  3. Step 3: Cross multiply
    260,035.60x = 390,053.40 × 218,045.20
  4. Step 4: Simplify right side
    260,035.60x = 85,049,271,613.68
  5. Step 5: Solve for x
    x = 85,049,271,613.68/260,035.60
  6. Step 6: Final answer
    x = 327,067.80

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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.