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Finding the Fourth Proportional to 556.88, 768.43 and 346.75

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Solution

The fourth proportional to 556.88, 768.43 and 346.75 is: 478.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.88 : 768.43 = 346.75 : x
  2. Step 2: Convert to fraction form
    556.88/768.43 = 346.75/x
  3. Step 3: Cross multiply
    556.88x = 768.43 × 346.75
  4. Step 4: Simplify right side
    556.88x = 266,453.10
  5. Step 5: Solve for x
    x = 266,453.10/556.88
  6. Step 6: Final answer
    x = 478.47

Related Problems

Find fourth proportional to 278.44, 384.22 and 173.38
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Double scale
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Similar ratio
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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.