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Finding the Fourth Proportional to 1,140.51, 1,573.91 and 636.37

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Solution

The fourth proportional to 1,140.51, 1,573.91 and 636.37 is: 878.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.51 : 1,573.91 = 636.37 : x
  2. Step 2: Convert to fraction form
    1,140.51/1,573.91 = 636.37/x
  3. Step 3: Cross multiply
    1,140.51x = 1,573.91 × 636.37
  4. Step 4: Simplify right side
    1,140.51x = 1,001,589.11
  5. Step 5: Solve for x
    x = 1,001,589.11/1,140.51
  6. Step 6: Final answer
    x = 878.19

Related Problems

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Half scale
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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.