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Finding the Fourth Proportional to 757.40, 1,136.58 and 483.68

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Solution

The fourth proportional to 757.40, 1,136.58 and 483.68 is: 725.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.40 : 1,136.58 = 483.68 : x
  2. Step 2: Convert to fraction form
    757.40/1,136.58 = 483.68/x
  3. Step 3: Cross multiply
    757.40x = 1,136.58 × 483.68
  4. Step 4: Simplify right side
    757.40x = 549,741.01
  5. Step 5: Solve for x
    x = 549,741.01/757.40
  6. Step 6: Final answer
    x = 725.83

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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.