Home / 1,218.24-1,827.36-438.35

Finding the Fourth Proportional to 1,218.24, 1,827.36 and 438.35

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Solution

The fourth proportional to 1,218.24, 1,827.36 and 438.35 is: 657.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.24 : 1,827.36 = 438.35 : x
  2. Step 2: Convert to fraction form
    1,218.24/1,827.36 = 438.35/x
  3. Step 3: Cross multiply
    1,218.24x = 1,827.36 × 438.35
  4. Step 4: Simplify right side
    1,218.24x = 801,014.12
  5. Step 5: Solve for x
    x = 801,014.12/1,218.24
  6. Step 6: Final answer
    x = 657.52

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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.