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Finding the Fourth Proportional to 259,809.20, 389,713.80 and 101,985.20

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Solution

The fourth proportional to 259,809.20, 389,713.80 and 101,985.20 is: 152,977.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,809.20 : 389,713.80 = 101,985.20 : x
  2. Step 2: Convert to fraction form
    259,809.20/389,713.80 = 101,985.20/x
  3. Step 3: Cross multiply
    259,809.20x = 389,713.80 × 101,985.20
  4. Step 4: Simplify right side
    259,809.20x = 39,745,039,835.76
  5. Step 5: Solve for x
    x = 39,745,039,835.76/259,809.20
  6. Step 6: Final answer
    x = 152,977.80

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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.