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Finding the Fourth Proportional to 1,707.29, 2,355.93 and 999.11

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Solution

The fourth proportional to 1,707.29, 2,355.93 and 999.11 is: 1,378.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,707.29 : 2,355.93 = 999.11 : x
  2. Step 2: Convert to fraction form
    1,707.29/2,355.93 = 999.11/x
  3. Step 3: Cross multiply
    1,707.29x = 2,355.93 × 999.11
  4. Step 4: Simplify right side
    1,707.29x = 2,353,821.44
  5. Step 5: Solve for x
    x = 2,353,821.44/1,707.29
  6. Step 6: Final answer
    x = 1,378.69

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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.