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Finding the Fourth Proportional to 1,602.12, 2,403.18 and 386.12

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Solution

The fourth proportional to 1,602.12, 2,403.18 and 386.12 is: 579.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,602.12 : 2,403.18 = 386.12 : x
  2. Step 2: Convert to fraction form
    1,602.12/2,403.18 = 386.12/x
  3. Step 3: Cross multiply
    1,602.12x = 2,403.18 × 386.12
  4. Step 4: Simplify right side
    1,602.12x = 927,915.86
  5. Step 5: Solve for x
    x = 927,915.86/1,602.12
  6. Step 6: Final answer
    x = 579.18

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Double scale
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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.