Home / 280,264,744.80-420,397,117.20-259,857,410.40

Finding the Fourth Proportional to 280,264,744.80, 420,397,117.20 and 259,857,410.40

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Solution

The fourth proportional to 280,264,744.80, 420,397,117.20 and 259,857,410.40 is: 389,786,115.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,264,744.80 : 420,397,117.20 = 259,857,410.40 : x
  2. Step 2: Convert to fraction form
    280,264,744.80/420,397,117.20 = 259,857,410.40/x
  3. Step 3: Cross multiply
    280,264,744.80x = 420,397,117.20 × 259,857,410.40
  4. Step 4: Simplify right side
    280,264,744.80x = 109,243,306,215,217,296
  5. Step 5: Solve for x
    x = 109,243,306,215,217,296/280,264,744.80
  6. Step 6: Final answer
    x = 389,786,115.60

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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.