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Finding the Fourth Proportional to 1,953.99, 2,931.39 and 637.88

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Solution

The fourth proportional to 1,953.99, 2,931.39 and 637.88 is: 956.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,953.99 : 2,931.39 = 637.88 : x
  2. Step 2: Convert to fraction form
    1,953.99/2,931.39 = 637.88/x
  3. Step 3: Cross multiply
    1,953.99x = 2,931.39 × 637.88
  4. Step 4: Simplify right side
    1,953.99x = 1,869,860.40
  5. Step 5: Solve for x
    x = 1,869,860.40/1,953.99
  6. Step 6: Final answer
    x = 956.94

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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.