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Finding the Fourth Proportional to 1,317.99, 1,818.93 and 758.60

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Solution

The fourth proportional to 1,317.99, 1,818.93 and 758.60 is: 1,046.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.99 : 1,818.93 = 758.60 : x
  2. Step 2: Convert to fraction form
    1,317.99/1,818.93 = 758.60/x
  3. Step 3: Cross multiply
    1,317.99x = 1,818.93 × 758.60
  4. Step 4: Simplify right side
    1,317.99x = 1,379,840.30
  5. Step 5: Solve for x
    x = 1,379,840.30/1,317.99
  6. Step 6: Final answer
    x = 1,046.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.