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Finding the Fourth Proportional to 260,015.28, 389,703.90 and 147,789.50

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Solution

The fourth proportional to 260,015.28, 389,703.90 and 147,789.50 is: 221,502.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,015.28 : 389,703.90 = 147,789.50 : x
  2. Step 2: Convert to fraction form
    260,015.28/389,703.90 = 147,789.50/x
  3. Step 3: Cross multiply
    260,015.28x = 389,703.90 × 147,789.50
  4. Step 4: Simplify right side
    260,015.28x = 57,594,144,529.05
  5. Step 5: Solve for x
    x = 57,594,144,529.05/260,015.28
  6. Step 6: Final answer
    x = 221,502.92

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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.