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Finding the Fourth Proportional to 1,270.02, 1,903.19 and 620.02

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Solution

The fourth proportional to 1,270.02, 1,903.19 and 620.02 is: 929.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.02 : 1,903.19 = 620.02 : x
  2. Step 2: Convert to fraction form
    1,270.02/1,903.19 = 620.02/x
  3. Step 3: Cross multiply
    1,270.02x = 1,903.19 × 620.02
  4. Step 4: Simplify right side
    1,270.02x = 1,180,015.86
  5. Step 5: Solve for x
    x = 1,180,015.86/1,270.02
  6. Step 6: Final answer
    x = 929.13

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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.