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Finding the Fourth Proportional to 740.53, 1,021.17 and 507.25

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Solution

The fourth proportional to 740.53, 1,021.17 and 507.25 is: 699.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.53 : 1,021.17 = 507.25 : x
  2. Step 2: Convert to fraction form
    740.53/1,021.17 = 507.25/x
  3. Step 3: Cross multiply
    740.53x = 1,021.17 × 507.25
  4. Step 4: Simplify right side
    740.53x = 517,988.48
  5. Step 5: Solve for x
    x = 517,988.48/740.53
  6. Step 6: Final answer
    x = 699.48

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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.