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Finding the Fourth Proportional to 813.50, 1,220.04 and 504.21

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Solution

The fourth proportional to 813.50, 1,220.04 and 504.21 is: 756.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    813.50 : 1,220.04 = 504.21 : x
  2. Step 2: Convert to fraction form
    813.50/1,220.04 = 504.21/x
  3. Step 3: Cross multiply
    813.50x = 1,220.04 × 504.21
  4. Step 4: Simplify right side
    813.50x = 615,156.37
  5. Step 5: Solve for x
    x = 615,156.37/813.50
  6. Step 6: Final answer
    x = 756.19

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.