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Finding the Fourth Proportional to 1,728.76, 2,385.30 and 1,030

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Solution

The fourth proportional to 1,728.76, 2,385.30 and 1,030 is: 1,421.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.76 : 2,385.30 = 1,030 : x
  2. Step 2: Convert to fraction form
    1,728.76/2,385.30 = 1,030/x
  3. Step 3: Cross multiply
    1,728.76x = 2,385.30 × 1,030
  4. Step 4: Simplify right side
    1,728.76x = 2,456,859
  5. Step 5: Solve for x
    x = 2,456,859/1,728.76
  6. Step 6: Final answer
    x = 1,421.17

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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.