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Finding the Fourth Proportional to 556.76, 768.04 and 519.20

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Solution

The fourth proportional to 556.76, 768.04 and 519.20 is: 716.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.76 : 768.04 = 519.20 : x
  2. Step 2: Convert to fraction form
    556.76/768.04 = 519.20/x
  3. Step 3: Cross multiply
    556.76x = 768.04 × 519.20
  4. Step 4: Simplify right side
    556.76x = 398,766.37
  5. Step 5: Solve for x
    x = 398,766.37/556.76
  6. Step 6: Final answer
    x = 716.23

Related Problems

Find fourth proportional to 278.38, 384.02 and 259.60
Half scale
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Double scale
Find fourth proportional to 557.76, 769.42 and 520.20
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.