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Finding the Fourth Proportional to 1,058.06, 1,587.09 and 288.56

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Solution

The fourth proportional to 1,058.06, 1,587.09 and 288.56 is: 432.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,058.06 : 1,587.09 = 288.56 : x
  2. Step 2: Convert to fraction form
    1,058.06/1,587.09 = 288.56/x
  3. Step 3: Cross multiply
    1,058.06x = 1,587.09 × 288.56
  4. Step 4: Simplify right side
    1,058.06x = 457,975.74
  5. Step 5: Solve for x
    x = 457,975.74/1,058.06
  6. Step 6: Final answer
    x = 432.84

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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.