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Finding the Fourth Proportional to 1,434.69, 2,151.68 and 460.53

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Solution

The fourth proportional to 1,434.69, 2,151.68 and 460.53 is: 690.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,434.69 : 2,151.68 = 460.53 : x
  2. Step 2: Convert to fraction form
    1,434.69/2,151.68 = 460.53/x
  3. Step 3: Cross multiply
    1,434.69x = 2,151.68 × 460.53
  4. Step 4: Simplify right side
    1,434.69x = 990,910.89
  5. Step 5: Solve for x
    x = 990,910.89/1,434.69
  6. Step 6: Final answer
    x = 690.68

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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.