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Finding the Fourth Proportional to 1,058.35, 1,584.38 and 785.65

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Solution

The fourth proportional to 1,058.35, 1,584.38 and 785.65 is: 1,176.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,058.35 : 1,584.38 = 785.65 : x
  2. Step 2: Convert to fraction form
    1,058.35/1,584.38 = 785.65/x
  3. Step 3: Cross multiply
    1,058.35x = 1,584.38 × 785.65
  4. Step 4: Simplify right side
    1,058.35x = 1,244,768.15
  5. Step 5: Solve for x
    x = 1,244,768.15/1,058.35
  6. Step 6: Final answer
    x = 1,176.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.