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Finding the Fourth Proportional to 7.61, 10.50 and 4.70

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Solution

The fourth proportional to 7.61, 10.50 and 4.70 is: 6.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.61 : 10.50 = 4.70 : x
  2. Step 2: Convert to fraction form
    7.61/10.50 = 4.70/x
  3. Step 3: Cross multiply
    7.61x = 10.50 × 4.70
  4. Step 4: Simplify right side
    7.61x = 49.32
  5. Step 5: Solve for x
    x = 49.32/7.61
  6. Step 6: Final answer
    x = 6.48

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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.