Home / 389,965.80-583,964.55-256,121.40

Finding the Fourth Proportional to 389,965.80, 583,964.55 and 256,121.40

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Solution

The fourth proportional to 389,965.80, 583,964.55 and 256,121.40 is: 383,535.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,965.80 : 583,964.55 = 256,121.40 : x
  2. Step 2: Convert to fraction form
    389,965.80/583,964.55 = 256,121.40/x
  3. Step 3: Cross multiply
    389,965.80x = 583,964.55 × 256,121.40
  4. Step 4: Simplify right side
    389,965.80x = 149,565,818,096.37
  5. Step 5: Solve for x
    x = 149,565,818,096.37/389,965.80
  6. Step 6: Final answer
    x = 383,535.73

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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.