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Finding the Fourth Proportional to 854.76, 1,176.81 and 665.48

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Solution

The fourth proportional to 854.76, 1,176.81 and 665.48 is: 916.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.76 : 1,176.81 = 665.48 : x
  2. Step 2: Convert to fraction form
    854.76/1,176.81 = 665.48/x
  3. Step 3: Cross multiply
    854.76x = 1,176.81 × 665.48
  4. Step 4: Simplify right side
    854.76x = 783,137.63
  5. Step 5: Solve for x
    x = 783,137.63/854.76
  6. Step 6: Final answer
    x = 916.21

Related Problems

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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.