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Finding the Fourth Proportional to 949.61, 1,423.99 and 401.51

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Solution

The fourth proportional to 949.61, 1,423.99 and 401.51 is: 602.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.61 : 1,423.99 = 401.51 : x
  2. Step 2: Convert to fraction form
    949.61/1,423.99 = 401.51/x
  3. Step 3: Cross multiply
    949.61x = 1,423.99 × 401.51
  4. Step 4: Simplify right side
    949.61x = 571,750.29
  5. Step 5: Solve for x
    x = 571,750.29/949.61
  6. Step 6: Final answer
    x = 602.09

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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.