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Finding the Fourth Proportional to 1,220.09, 1,830.31 and 354.29

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Solution

The fourth proportional to 1,220.09, 1,830.31 and 354.29 is: 531.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.09 : 1,830.31 = 354.29 : x
  2. Step 2: Convert to fraction form
    1,220.09/1,830.31 = 354.29/x
  3. Step 3: Cross multiply
    1,220.09x = 1,830.31 × 354.29
  4. Step 4: Simplify right side
    1,220.09x = 648,460.53
  5. Step 5: Solve for x
    x = 648,460.53/1,220.09
  6. Step 6: Final answer
    x = 531.49

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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.