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Finding the Fourth Proportional to 1,135.27, 1,566.62 and 663.19

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Solution

The fourth proportional to 1,135.27, 1,566.62 and 663.19 is: 915.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.27 : 1,566.62 = 663.19 : x
  2. Step 2: Convert to fraction form
    1,135.27/1,566.62 = 663.19/x
  3. Step 3: Cross multiply
    1,135.27x = 1,566.62 × 663.19
  4. Step 4: Simplify right side
    1,135.27x = 1,038,968.38
  5. Step 5: Solve for x
    x = 1,038,968.38/1,135.27
  6. Step 6: Final answer
    x = 915.17

Related Problems

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Half scale
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Double scale
Find fourth proportional to 1,136.27, 1,568 and 664.19
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.