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Finding the Fourth Proportional to 2,492.74, 3,439.90 and 1,430.68

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Solution

The fourth proportional to 2,492.74, 3,439.90 and 1,430.68 is: 1,974.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,492.74 : 3,439.90 = 1,430.68 : x
  2. Step 2: Convert to fraction form
    2,492.74/3,439.90 = 1,430.68/x
  3. Step 3: Cross multiply
    2,492.74x = 3,439.90 × 1,430.68
  4. Step 4: Simplify right side
    2,492.74x = 4,921,396.13
  5. Step 5: Solve for x
    x = 4,921,396.13/2,492.74
  6. Step 6: Final answer
    x = 1,974.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.