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Finding the Fourth Proportional to 917.54, 1,377 and 507.03

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Solution

The fourth proportional to 917.54, 1,377 and 507.03 is: 760.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.54 : 1,377 = 507.03 : x
  2. Step 2: Convert to fraction form
    917.54/1,377 = 507.03/x
  3. Step 3: Cross multiply
    917.54x = 1,377 × 507.03
  4. Step 4: Simplify right side
    917.54x = 698,175.15
  5. Step 5: Solve for x
    x = 698,175.15/917.54
  6. Step 6: Final answer
    x = 760.92

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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.