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Finding the Fourth Proportional to 372,178.98, 513,491.13 and 211,021.38

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Solution

The fourth proportional to 372,178.98, 513,491.13 and 211,021.38 is: 291,143.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,178.98 : 513,491.13 = 211,021.38 : x
  2. Step 2: Convert to fraction form
    372,178.98/513,491.13 = 211,021.38/x
  3. Step 3: Cross multiply
    372,178.98x = 513,491.13 × 211,021.38
  4. Step 4: Simplify right side
    372,178.98x = 108,357,606,870.36
  5. Step 5: Solve for x
    x = 108,357,606,870.36/372,178.98
  6. Step 6: Final answer
    x = 291,143.81

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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.