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Finding the Fourth Proportional to 1,690.71, 2,533.68 and 997.53

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Solution

The fourth proportional to 1,690.71, 2,533.68 and 997.53 is: 1,494.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.71 : 2,533.68 = 997.53 : x
  2. Step 2: Convert to fraction form
    1,690.71/2,533.68 = 997.53/x
  3. Step 3: Cross multiply
    1,690.71x = 2,533.68 × 997.53
  4. Step 4: Simplify right side
    1,690.71x = 2,527,421.81
  5. Step 5: Solve for x
    x = 2,527,421.81/1,690.71
  6. Step 6: Final answer
    x = 1,494.89

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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.