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Finding the Fourth Proportional to 372,123.87, 513,515.44 and 210,989.81

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Solution

The fourth proportional to 372,123.87, 513,515.44 and 210,989.81 is: 291,157.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,123.87 : 513,515.44 = 210,989.81 : x
  2. Step 2: Convert to fraction form
    372,123.87/513,515.44 = 210,989.81/x
  3. Step 3: Cross multiply
    372,123.87x = 513,515.44 × 210,989.81
  4. Step 4: Simplify right side
    372,123.87x = 108,346,524,590.19
  5. Step 5: Solve for x
    x = 108,346,524,590.19/372,123.87
  6. Step 6: Final answer
    x = 291,157.15

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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.