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Finding the Fourth Proportional to 259,740.30, 389,610.45 and 253,908.30

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Solution

The fourth proportional to 259,740.30, 389,610.45 and 253,908.30 is: 380,862.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,740.30 : 389,610.45 = 253,908.30 : x
  2. Step 2: Convert to fraction form
    259,740.30/389,610.45 = 253,908.30/x
  3. Step 3: Cross multiply
    259,740.30x = 389,610.45 × 253,908.30
  4. Step 4: Simplify right side
    259,740.30x = 98,925,327,021.74
  5. Step 5: Solve for x
    x = 98,925,327,021.74/259,740.30
  6. Step 6: Final answer
    x = 380,862.45

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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.