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Finding the Fourth Proportional to 874.01, 1,308.86 and 507.69

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Solution

The fourth proportional to 874.01, 1,308.86 and 507.69 is: 760.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.01 : 1,308.86 = 507.69 : x
  2. Step 2: Convert to fraction form
    874.01/1,308.86 = 507.69/x
  3. Step 3: Cross multiply
    874.01x = 1,308.86 × 507.69
  4. Step 4: Simplify right side
    874.01x = 664,492.59
  5. Step 5: Solve for x
    x = 664,492.59/874.01
  6. Step 6: Final answer
    x = 760.28

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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.