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Finding the Fourth Proportional to 851.54, 1,277.63 and 580.19

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Solution

The fourth proportional to 851.54, 1,277.63 and 580.19 is: 870.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.54 : 1,277.63 = 580.19 : x
  2. Step 2: Convert to fraction form
    851.54/1,277.63 = 580.19/x
  3. Step 3: Cross multiply
    851.54x = 1,277.63 × 580.19
  4. Step 4: Simplify right side
    851.54x = 741,258.86
  5. Step 5: Solve for x
    x = 741,258.86/851.54
  6. Step 6: Final answer
    x = 870.50

Related Problems

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.