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Finding the Fourth Proportional to 1,857.17, 2,785.80 and 624.62

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Solution

The fourth proportional to 1,857.17, 2,785.80 and 624.62 is: 936.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,857.17 : 2,785.80 = 624.62 : x
  2. Step 2: Convert to fraction form
    1,857.17/2,785.80 = 624.62/x
  3. Step 3: Cross multiply
    1,857.17x = 2,785.80 × 624.62
  4. Step 4: Simplify right side
    1,857.17x = 1,740,066.40
  5. Step 5: Solve for x
    x = 1,740,066.40/1,857.17
  6. Step 6: Final answer
    x = 936.95

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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.