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Finding the Fourth Proportional to 507.16, 700.68 and 389.62

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Solution

The fourth proportional to 507.16, 700.68 and 389.62 is: 538.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.16 : 700.68 = 389.62 : x
  2. Step 2: Convert to fraction form
    507.16/700.68 = 389.62/x
  3. Step 3: Cross multiply
    507.16x = 700.68 × 389.62
  4. Step 4: Simplify right side
    507.16x = 272,998.94
  5. Step 5: Solve for x
    x = 272,998.94/507.16
  6. Step 6: Final answer
    x = 538.29

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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.