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Finding the Fourth Proportional to 571.98, 788.72 and 440.76

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Solution

The fourth proportional to 571.98, 788.72 and 440.76 is: 607.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.98 : 788.72 = 440.76 : x
  2. Step 2: Convert to fraction form
    571.98/788.72 = 440.76/x
  3. Step 3: Cross multiply
    571.98x = 788.72 × 440.76
  4. Step 4: Simplify right side
    571.98x = 347,636.23
  5. Step 5: Solve for x
    x = 347,636.23/571.98
  6. Step 6: Final answer
    x = 607.78

Related Problems

Find fourth proportional to 285.99, 394.36 and 220.38
Half scale
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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.