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Finding the Fourth Proportional to 3,166.50, 4,749.75 and 858

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Solution

The fourth proportional to 3,166.50, 4,749.75 and 858 is: 1,287

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,166.50 : 4,749.75 = 858 : x
  2. Step 2: Convert to fraction form
    3,166.50/4,749.75 = 858/x
  3. Step 3: Cross multiply
    3,166.50x = 4,749.75 × 858
  4. Step 4: Simplify right side
    3,166.50x = 4,075,285.50
  5. Step 5: Solve for x
    x = 4,075,285.50/3,166.50
  6. Step 6: Final answer
    x = 1,287

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.