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Finding the Fourth Proportional to 959.90, 1,324.62 and 587.51

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Solution

The fourth proportional to 959.90, 1,324.62 and 587.51 is: 810.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.90 : 1,324.62 = 587.51 : x
  2. Step 2: Convert to fraction form
    959.90/1,324.62 = 587.51/x
  3. Step 3: Cross multiply
    959.90x = 1,324.62 × 587.51
  4. Step 4: Simplify right side
    959.90x = 778,227.50
  5. Step 5: Solve for x
    x = 778,227.50/959.90
  6. Step 6: Final answer
    x = 810.74

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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.