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Finding the Fourth Proportional to 889.77, 1,339.59 and 695.82

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Solution

The fourth proportional to 889.77, 1,339.59 and 695.82 is: 1,047.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.77 : 1,339.59 = 695.82 : x
  2. Step 2: Convert to fraction form
    889.77/1,339.59 = 695.82/x
  3. Step 3: Cross multiply
    889.77x = 1,339.59 × 695.82
  4. Step 4: Simplify right side
    889.77x = 932,113.51
  5. Step 5: Solve for x
    x = 932,113.51/889.77
  6. Step 6: Final answer
    x = 1,047.59

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.