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Finding the Fourth Proportional to 618.98, 857.89 and 607.46

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Solution

The fourth proportional to 618.98, 857.89 and 607.46 is: 841.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.98 : 857.89 = 607.46 : x
  2. Step 2: Convert to fraction form
    618.98/857.89 = 607.46/x
  3. Step 3: Cross multiply
    618.98x = 857.89 × 607.46
  4. Step 4: Simplify right side
    618.98x = 521,133.86
  5. Step 5: Solve for x
    x = 521,133.86/618.98
  6. Step 6: Final answer
    x = 841.92

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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.