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Finding the Fourth Proportional to 883.49, 1,219.18 and 485.16

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Solution

The fourth proportional to 883.49, 1,219.18 and 485.16 is: 669.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.49 : 1,219.18 = 485.16 : x
  2. Step 2: Convert to fraction form
    883.49/1,219.18 = 485.16/x
  3. Step 3: Cross multiply
    883.49x = 1,219.18 × 485.16
  4. Step 4: Simplify right side
    883.49x = 591,488.85
  5. Step 5: Solve for x
    x = 591,488.85/883.49
  6. Step 6: Final answer
    x = 669.50

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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.