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Finding the Fourth Proportional to 507.26, 699.54 and 320.64

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Solution

The fourth proportional to 507.26, 699.54 and 320.64 is: 442.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.26 : 699.54 = 320.64 : x
  2. Step 2: Convert to fraction form
    507.26/699.54 = 320.64/x
  3. Step 3: Cross multiply
    507.26x = 699.54 × 320.64
  4. Step 4: Simplify right side
    507.26x = 224,300.51
  5. Step 5: Solve for x
    x = 224,300.51/507.26
  6. Step 6: Final answer
    x = 442.18

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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.