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Finding the Fourth Proportional to 260,526.80, 389,623.80 and 218,536.40

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Solution

The fourth proportional to 260,526.80, 389,623.80 and 218,536.40 is: 326,826.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,526.80 : 389,623.80 = 218,536.40 : x
  2. Step 2: Convert to fraction form
    260,526.80/389,623.80 = 218,536.40/x
  3. Step 3: Cross multiply
    260,526.80x = 389,623.80 × 218,536.40
  4. Step 4: Simplify right side
    260,526.80x = 85,146,982,606.32
  5. Step 5: Solve for x
    x = 85,146,982,606.32/260,526.80
  6. Step 6: Final answer
    x = 326,826.19

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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.