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Finding the Fourth Proportional to 507.65, 700.19 and 490.71

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Solution

The fourth proportional to 507.65, 700.19 and 490.71 is: 676.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.65 : 700.19 = 490.71 : x
  2. Step 2: Convert to fraction form
    507.65/700.19 = 490.71/x
  3. Step 3: Cross multiply
    507.65x = 700.19 × 490.71
  4. Step 4: Simplify right side
    507.65x = 343,587.78
  5. Step 5: Solve for x
    x = 343,587.78/507.65
  6. Step 6: Final answer
    x = 676.83

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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.