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Finding the Fourth Proportional to 897.62, 1,239.10 and 602.78

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Solution

The fourth proportional to 897.62, 1,239.10 and 602.78 is: 832.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.62 : 1,239.10 = 602.78 : x
  2. Step 2: Convert to fraction form
    897.62/1,239.10 = 602.78/x
  3. Step 3: Cross multiply
    897.62x = 1,239.10 × 602.78
  4. Step 4: Simplify right side
    897.62x = 746,897.00
  5. Step 5: Solve for x
    x = 746,897.00/897.62
  6. Step 6: Final answer
    x = 832.09

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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.