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Finding the Fourth Proportional to 1,370.68, 2,056.11 and 493.36

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Solution

The fourth proportional to 1,370.68, 2,056.11 and 493.36 is: 740.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370.68 : 2,056.11 = 493.36 : x
  2. Step 2: Convert to fraction form
    1,370.68/2,056.11 = 493.36/x
  3. Step 3: Cross multiply
    1,370.68x = 2,056.11 × 493.36
  4. Step 4: Simplify right side
    1,370.68x = 1,014,402.43
  5. Step 5: Solve for x
    x = 1,014,402.43/1,370.68
  6. Step 6: Final answer
    x = 740.07

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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.