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Finding the Fourth Proportional to 4.77, 6.57 and 4.19

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Solution

The fourth proportional to 4.77, 6.57 and 4.19 is: 5.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.77 : 6.57 = 4.19 : x
  2. Step 2: Convert to fraction form
    4.77/6.57 = 4.19/x
  3. Step 3: Cross multiply
    4.77x = 6.57 × 4.19
  4. Step 4: Simplify right side
    4.77x = 27.47
  5. Step 5: Solve for x
    x = 27.47/4.77
  6. Step 6: Final answer
    x = 5.77

Related Problems

Find fourth proportional to 2.38, 3.28 and 2.09
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Double scale
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1.5x scale

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.