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Finding the Fourth Proportional to 508.00, 761.98 and 142.78

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Solution

The fourth proportional to 508.00, 761.98 and 142.78 is: 214.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.00 : 761.98 = 142.78 : x
  2. Step 2: Convert to fraction form
    508.00/761.98 = 142.78/x
  3. Step 3: Cross multiply
    508.00x = 761.98 × 142.78
  4. Step 4: Simplify right side
    508.00x = 108,792.13
  5. Step 5: Solve for x
    x = 108,792.13/508.00
  6. Step 6: Final answer
    x = 214.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.