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Finding the Fourth Proportional to 1,603.46, 2,405.09 and 508.61

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Solution

The fourth proportional to 1,603.46, 2,405.09 and 508.61 is: 762.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.46 : 2,405.09 = 508.61 : x
  2. Step 2: Convert to fraction form
    1,603.46/2,405.09 = 508.61/x
  3. Step 3: Cross multiply
    1,603.46x = 2,405.09 × 508.61
  4. Step 4: Simplify right side
    1,603.46x = 1,223,260.11
  5. Step 5: Solve for x
    x = 1,223,260.11/1,603.46
  6. Step 6: Final answer
    x = 762.89

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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.