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Finding the Fourth Proportional to 1,058.68, 1,587.34 and 509.77

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Solution

The fourth proportional to 1,058.68, 1,587.34 and 509.77 is: 764.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,058.68 : 1,587.34 = 509.77 : x
  2. Step 2: Convert to fraction form
    1,058.68/1,587.34 = 509.77/x
  3. Step 3: Cross multiply
    1,058.68x = 1,587.34 × 509.77
  4. Step 4: Simplify right side
    1,058.68x = 809,178.31
  5. Step 5: Solve for x
    x = 809,178.31/1,058.68
  6. Step 6: Final answer
    x = 764.33

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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.