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Finding the Fourth Proportional to 1,455.96, 2,009.55 and 958.65

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Solution

The fourth proportional to 1,455.96, 2,009.55 and 958.65 is: 1,323.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,455.96 : 2,009.55 = 958.65 : x
  2. Step 2: Convert to fraction form
    1,455.96/2,009.55 = 958.65/x
  3. Step 3: Cross multiply
    1,455.96x = 2,009.55 × 958.65
  4. Step 4: Simplify right side
    1,455.96x = 1,926,455.11
  5. Step 5: Solve for x
    x = 1,926,455.11/1,455.96
  6. Step 6: Final answer
    x = 1,323.15

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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.