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Finding the Fourth Proportional to 556.76, 768.26 and 346.95

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Solution

The fourth proportional to 556.76, 768.26 and 346.95 is: 478.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.76 : 768.26 = 346.95 : x
  2. Step 2: Convert to fraction form
    556.76/768.26 = 346.95/x
  3. Step 3: Cross multiply
    556.76x = 768.26 × 346.95
  4. Step 4: Simplify right side
    556.76x = 266,542.23
  5. Step 5: Solve for x
    x = 266,542.23/556.76
  6. Step 6: Final answer
    x = 478.74

Related Problems

Find fourth proportional to 278.38, 384.13 and 173.47
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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.