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Finding the Fourth Proportional to 1,220.24, 1,830.48 and 354.50

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Solution

The fourth proportional to 1,220.24, 1,830.48 and 354.50 is: 531.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.24 : 1,830.48 = 354.50 : x
  2. Step 2: Convert to fraction form
    1,220.24/1,830.48 = 354.50/x
  3. Step 3: Cross multiply
    1,220.24x = 1,830.48 × 354.50
  4. Step 4: Simplify right side
    1,220.24x = 648,905.16
  5. Step 5: Solve for x
    x = 648,905.16/1,220.24
  6. Step 6: Final answer
    x = 531.78

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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.