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Finding the Fourth Proportional to 889.77, 1,335.09 and 369.92

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Solution

The fourth proportional to 889.77, 1,335.09 and 369.92 is: 555.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.77 : 1,335.09 = 369.92 : x
  2. Step 2: Convert to fraction form
    889.77/1,335.09 = 369.92/x
  3. Step 3: Cross multiply
    889.77x = 1,335.09 × 369.92
  4. Step 4: Simplify right side
    889.77x = 493,869.82
  5. Step 5: Solve for x
    x = 493,869.82/889.77
  6. Step 6: Final answer
    x = 555.05

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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.