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Finding the Fourth Proportional to 507.22, 699.70 and 320.92

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Solution

The fourth proportional to 507.22, 699.70 and 320.92 is: 442.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.22 : 699.70 = 320.92 : x
  2. Step 2: Convert to fraction form
    507.22/699.70 = 320.92/x
  3. Step 3: Cross multiply
    507.22x = 699.70 × 320.92
  4. Step 4: Simplify right side
    507.22x = 224,547.72
  5. Step 5: Solve for x
    x = 224,547.72/507.22
  6. Step 6: Final answer
    x = 442.70

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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.