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Finding the Fourth Proportional to 855.31, 1,180.26 and 501.19

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Solution

The fourth proportional to 855.31, 1,180.26 and 501.19 is: 691.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.31 : 1,180.26 = 501.19 : x
  2. Step 2: Convert to fraction form
    855.31/1,180.26 = 501.19/x
  3. Step 3: Cross multiply
    855.31x = 1,180.26 × 501.19
  4. Step 4: Simplify right side
    855.31x = 591,534.51
  5. Step 5: Solve for x
    x = 591,534.51/855.31
  6. Step 6: Final answer
    x = 691.60

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.