Home / 382,818.32-528,306.60-221,680.40

Finding the Fourth Proportional to 382,818.32, 528,306.60 and 221,680.40

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Solution

The fourth proportional to 382,818.32, 528,306.60 and 221,680.40 is: 305,928.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,818.32 : 528,306.60 = 221,680.40 : x
  2. Step 2: Convert to fraction form
    382,818.32/528,306.60 = 221,680.40/x
  3. Step 3: Cross multiply
    382,818.32x = 528,306.60 × 221,680.40
  4. Step 4: Simplify right side
    382,818.32x = 117,115,218,410.64
  5. Step 5: Solve for x
    x = 117,115,218,410.64/382,818.32
  6. Step 6: Final answer
    x = 305,928.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.