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Finding the Fourth Proportional to 607.18, 837.61 and 386.20

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Solution

The fourth proportional to 607.18, 837.61 and 386.20 is: 532.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.18 : 837.61 = 386.20 : x
  2. Step 2: Convert to fraction form
    607.18/837.61 = 386.20/x
  3. Step 3: Cross multiply
    607.18x = 837.61 × 386.20
  4. Step 4: Simplify right side
    607.18x = 323,485.06
  5. Step 5: Solve for x
    x = 323,485.06/607.18
  6. Step 6: Final answer
    x = 532.77

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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.