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Finding the Fourth Proportional to 654.76, 901.25 and 561.41

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Solution

The fourth proportional to 654.76, 901.25 and 561.41 is: 772.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.76 : 901.25 = 561.41 : x
  2. Step 2: Convert to fraction form
    654.76/901.25 = 561.41/x
  3. Step 3: Cross multiply
    654.76x = 901.25 × 561.41
  4. Step 4: Simplify right side
    654.76x = 505,970.76
  5. Step 5: Solve for x
    x = 505,970.76/654.76
  6. Step 6: Final answer
    x = 772.76

Related Problems

Find fourth proportional to 327.38, 450.63 and 280.71
Half scale
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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.