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Finding the Fourth Proportional to 1,376.30, 1,898.43 and 910.70

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Solution

The fourth proportional to 1,376.30, 1,898.43 and 910.70 is: 1,256.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.30 : 1,898.43 = 910.70 : x
  2. Step 2: Convert to fraction form
    1,376.30/1,898.43 = 910.70/x
  3. Step 3: Cross multiply
    1,376.30x = 1,898.43 × 910.70
  4. Step 4: Simplify right side
    1,376.30x = 1,728,900.20
  5. Step 5: Solve for x
    x = 1,728,900.20/1,376.30
  6. Step 6: Final answer
    x = 1,256.19

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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.