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Finding the Fourth Proportional to 259,705.60, 389,266.80 and 109,920.40

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Solution

The fourth proportional to 259,705.60, 389,266.80 and 109,920.40 is: 164,757.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,705.60 : 389,266.80 = 109,920.40 : x
  2. Step 2: Convert to fraction form
    259,705.60/389,266.80 = 109,920.40/x
  3. Step 3: Cross multiply
    259,705.60x = 389,266.80 × 109,920.40
  4. Step 4: Simplify right side
    259,705.60x = 42,788,362,362.72
  5. Step 5: Solve for x
    x = 42,788,362,362.72/259,705.60
  6. Step 6: Final answer
    x = 164,757.18

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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.