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Finding the Fourth Proportional to 253,698.58, 380,568.99 and 85,210.90

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Solution

The fourth proportional to 253,698.58, 380,568.99 and 85,210.90 is: 127,823.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,698.58 : 380,568.99 = 85,210.90 : x
  2. Step 2: Convert to fraction form
    253,698.58/380,568.99 = 85,210.90/x
  3. Step 3: Cross multiply
    253,698.58x = 380,568.99 × 85,210.90
  4. Step 4: Simplify right side
    253,698.58x = 32,428,626,149.99
  5. Step 5: Solve for x
    x = 32,428,626,149.99/253,698.58
  6. Step 6: Final answer
    x = 127,823.44

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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.