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Finding the Fourth Proportional to 383,158.69, 528,759 and 213,392.80

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Solution

The fourth proportional to 383,158.69, 528,759 and 213,392.80 is: 294,482.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,158.69 : 528,759 = 213,392.80 : x
  2. Step 2: Convert to fraction form
    383,158.69/528,759 = 213,392.80/x
  3. Step 3: Cross multiply
    383,158.69x = 528,759 × 213,392.80
  4. Step 4: Simplify right side
    383,158.69x = 112,833,363,535.20
  5. Step 5: Solve for x
    x = 112,833,363,535.20/383,158.69
  6. Step 6: Final answer
    x = 294,482.07

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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.