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Finding the Fourth Proportional to 259,620.30, 389,430.45 and 141,230.70

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Solution

The fourth proportional to 259,620.30, 389,430.45 and 141,230.70 is: 211,846.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,620.30 : 389,430.45 = 141,230.70 : x
  2. Step 2: Convert to fraction form
    259,620.30/389,430.45 = 141,230.70/x
  3. Step 3: Cross multiply
    259,620.30x = 389,430.45 × 141,230.70
  4. Step 4: Simplify right side
    259,620.30x = 54,999,535,054.82
  5. Step 5: Solve for x
    x = 54,999,535,054.82/259,620.30
  6. Step 6: Final answer
    x = 211,846.05

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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.