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Finding the Fourth Proportional to 948.87, 1,423.55 and 299.61

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Solution

The fourth proportional to 948.87, 1,423.55 and 299.61 is: 449.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.87 : 1,423.55 = 299.61 : x
  2. Step 2: Convert to fraction form
    948.87/1,423.55 = 299.61/x
  3. Step 3: Cross multiply
    948.87x = 1,423.55 × 299.61
  4. Step 4: Simplify right side
    948.87x = 426,509.82
  5. Step 5: Solve for x
    x = 426,509.82/948.87
  6. Step 6: Final answer
    x = 449.49

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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.