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Finding the Fourth Proportional to 1,317.17, 1,976.00 and 623.50

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Solution

The fourth proportional to 1,317.17, 1,976.00 and 623.50 is: 935.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.17 : 1,976.00 = 623.50 : x
  2. Step 2: Convert to fraction form
    1,317.17/1,976.00 = 623.50/x
  3. Step 3: Cross multiply
    1,317.17x = 1,976.00 × 623.50
  4. Step 4: Simplify right side
    1,317.17x = 1,232,027.94
  5. Step 5: Solve for x
    x = 1,232,027.94/1,317.17
  6. Step 6: Final answer
    x = 935.36

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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.