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Finding the Fourth Proportional to 372,395, 513,900.78 and 202,626.20

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Solution

The fourth proportional to 372,395, 513,900.78 and 202,626.20 is: 279,621.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,395 : 513,900.78 = 202,626.20 : x
  2. Step 2: Convert to fraction form
    372,395/513,900.78 = 202,626.20/x
  3. Step 3: Cross multiply
    372,395x = 513,900.78 × 202,626.20
  4. Step 4: Simplify right side
    372,395x = 104,129,762,228.44
  5. Step 5: Solve for x
    x = 104,129,762,228.44/372,395
  6. Step 6: Final answer
    x = 279,621.81

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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.