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Finding the Fourth Proportional to 1,492.81, 2,239.97 and 670.92

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Solution

The fourth proportional to 1,492.81, 2,239.97 and 670.92 is: 1,006.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,492.81 : 2,239.97 = 670.92 : x
  2. Step 2: Convert to fraction form
    1,492.81/2,239.97 = 670.92/x
  3. Step 3: Cross multiply
    1,492.81x = 2,239.97 × 670.92
  4. Step 4: Simplify right side
    1,492.81x = 1,502,840.67
  5. Step 5: Solve for x
    x = 1,502,840.67/1,492.81
  6. Step 6: Final answer
    x = 1,006.72

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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.