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Finding the Fourth Proportional to 260,602.20, 390,903.30 and 208,114.20

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Solution

The fourth proportional to 260,602.20, 390,903.30 and 208,114.20 is: 312,171.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,602.20 : 390,903.30 = 208,114.20 : x
  2. Step 2: Convert to fraction form
    260,602.20/390,903.30 = 208,114.20/x
  3. Step 3: Cross multiply
    260,602.20x = 390,903.30 × 208,114.20
  4. Step 4: Simplify right side
    260,602.20x = 81,352,527,556.86
  5. Step 5: Solve for x
    x = 81,352,527,556.86/260,602.20
  6. Step 6: Final answer
    x = 312,171.30

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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.