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Finding the Fourth Proportional to 1,339.53, 2,009.21 and 462.21

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Solution

The fourth proportional to 1,339.53, 2,009.21 and 462.21 is: 693.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339.53 : 2,009.21 = 462.21 : x
  2. Step 2: Convert to fraction form
    1,339.53/2,009.21 = 462.21/x
  3. Step 3: Cross multiply
    1,339.53x = 2,009.21 × 462.21
  4. Step 4: Simplify right side
    1,339.53x = 928,674.64
  5. Step 5: Solve for x
    x = 928,674.64/1,339.53
  6. Step 6: Final answer
    x = 693.28

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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.