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Finding the Fourth Proportional to 1,058.83, 1,587.33 and 511.39

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Solution

The fourth proportional to 1,058.83, 1,587.33 and 511.39 is: 766.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,058.83 : 1,587.33 = 511.39 : x
  2. Step 2: Convert to fraction form
    1,058.83/1,587.33 = 511.39/x
  3. Step 3: Cross multiply
    1,058.83x = 1,587.33 × 511.39
  4. Step 4: Simplify right side
    1,058.83x = 811,746.67
  5. Step 5: Solve for x
    x = 811,746.67/1,058.83
  6. Step 6: Final answer
    x = 766.65

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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.