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Finding the Fourth Proportional to 1,230.09, 1,697.64 and 758.10

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Solution

The fourth proportional to 1,230.09, 1,697.64 and 758.10 is: 1,046.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.09 : 1,697.64 = 758.10 : x
  2. Step 2: Convert to fraction form
    1,230.09/1,697.64 = 758.10/x
  3. Step 3: Cross multiply
    1,230.09x = 1,697.64 × 758.10
  4. Step 4: Simplify right side
    1,230.09x = 1,286,980.88
  5. Step 5: Solve for x
    x = 1,286,980.88/1,230.09
  6. Step 6: Final answer
    x = 1,046.25

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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.