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Finding the Fourth Proportional to 212,760.81, 317,583.90 and 187,538.90

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Solution

The fourth proportional to 212,760.81, 317,583.90 and 187,538.90 is: 279,935.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,760.81 : 317,583.90 = 187,538.90 : x
  2. Step 2: Convert to fraction form
    212,760.81/317,583.90 = 187,538.90/x
  3. Step 3: Cross multiply
    212,760.81x = 317,583.90 × 187,538.90
  4. Step 4: Simplify right side
    212,760.81x = 59,559,332,752.75
  5. Step 5: Solve for x
    x = 59,559,332,752.75/212,760.81
  6. Step 6: Final answer
    x = 279,935.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.