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Finding the Fourth Proportional to 1,262.02, 1,891.74 and 439.72

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Solution

The fourth proportional to 1,262.02, 1,891.74 and 439.72 is: 659.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262.02 : 1,891.74 = 439.72 : x
  2. Step 2: Convert to fraction form
    1,262.02/1,891.74 = 439.72/x
  3. Step 3: Cross multiply
    1,262.02x = 1,891.74 × 439.72
  4. Step 4: Simplify right side
    1,262.02x = 831,835.91
  5. Step 5: Solve for x
    x = 831,835.91/1,262.02
  6. Step 6: Final answer
    x = 659.13

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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.