Home / 399,145.20-598,717.80-328,286.40

Finding the Fourth Proportional to 399,145.20, 598,717.80 and 328,286.40

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Solution

The fourth proportional to 399,145.20, 598,717.80 and 328,286.40 is: 492,429.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,145.20 : 598,717.80 = 328,286.40 : x
  2. Step 2: Convert to fraction form
    399,145.20/598,717.80 = 328,286.40/x
  3. Step 3: Cross multiply
    399,145.20x = 598,717.80 × 328,286.40
  4. Step 4: Simplify right side
    399,145.20x = 196,550,911,177.92
  5. Step 5: Solve for x
    x = 196,550,911,177.92/399,145.20
  6. Step 6: Final answer
    x = 492,429.60

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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.