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Finding the Fourth Proportional to 5.00, 6.87 and 4.70

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Solution

The fourth proportional to 5.00, 6.87 and 4.70 is: 6.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.00 : 6.87 = 4.70 : x
  2. Step 2: Convert to fraction form
    5.00/6.87 = 4.70/x
  3. Step 3: Cross multiply
    5.00x = 6.87 × 4.70
  4. Step 4: Simplify right side
    5.00x = 32.31
  5. Step 5: Solve for x
    x = 32.31/5.00
  6. Step 6: Final answer
    x = 6.47

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.