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Finding the Fourth Proportional to 641.90, 889.49 and 602.89

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Solution

The fourth proportional to 641.90, 889.49 and 602.89 is: 835.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.90 : 889.49 = 602.89 : x
  2. Step 2: Convert to fraction form
    641.90/889.49 = 602.89/x
  3. Step 3: Cross multiply
    641.90x = 889.49 × 602.89
  4. Step 4: Simplify right side
    641.90x = 536,259.39
  5. Step 5: Solve for x
    x = 536,259.39/641.90
  6. Step 6: Final answer
    x = 835.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.