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Finding the Fourth Proportional to 939.99, 1,296.37 and 608.10

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Solution

The fourth proportional to 939.99, 1,296.37 and 608.10 is: 838.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.99 : 1,296.37 = 608.10 : x
  2. Step 2: Convert to fraction form
    939.99/1,296.37 = 608.10/x
  3. Step 3: Cross multiply
    939.99x = 1,296.37 × 608.10
  4. Step 4: Simplify right side
    939.99x = 788,322.60
  5. Step 5: Solve for x
    x = 788,322.60/939.99
  6. Step 6: Final answer
    x = 838.65

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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.