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Finding the Fourth Proportional to 259,416.81, 389,000.66 and 147,066.87

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Solution

The fourth proportional to 259,416.81, 389,000.66 and 147,066.87 is: 220,529.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,416.81 : 389,000.66 = 147,066.87 : x
  2. Step 2: Convert to fraction form
    259,416.81/389,000.66 = 147,066.87/x
  3. Step 3: Cross multiply
    259,416.81x = 389,000.66 × 147,066.87
  4. Step 4: Simplify right side
    259,416.81x = 57,209,108,383.05
  5. Step 5: Solve for x
    x = 57,209,108,383.05/259,416.81
  6. Step 6: Final answer
    x = 220,529.69

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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.