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Finding the Fourth Proportional to 1,492.12, 2,238.95 and 670.23

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Solution

The fourth proportional to 1,492.12, 2,238.95 and 670.23 is: 1,005.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,492.12 : 2,238.95 = 670.23 : x
  2. Step 2: Convert to fraction form
    1,492.12/2,238.95 = 670.23/x
  3. Step 3: Cross multiply
    1,492.12x = 2,238.95 × 670.23
  4. Step 4: Simplify right side
    1,492.12x = 1,500,596.91
  5. Step 5: Solve for x
    x = 1,500,596.91/1,492.12
  6. Step 6: Final answer
    x = 1,005.68

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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.