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Finding the Fourth Proportional to 954.45, 1,317.51 and 622.76

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Solution

The fourth proportional to 954.45, 1,317.51 and 622.76 is: 859.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.45 : 1,317.51 = 622.76 : x
  2. Step 2: Convert to fraction form
    954.45/1,317.51 = 622.76/x
  3. Step 3: Cross multiply
    954.45x = 1,317.51 × 622.76
  4. Step 4: Simplify right side
    954.45x = 820,485.94
  5. Step 5: Solve for x
    x = 820,485.94/954.45
  6. Step 6: Final answer
    x = 859.64

Related Problems

Find fourth proportional to 477.23, 658.76 and 311.38
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.