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Finding the Fourth Proportional to 607.40, 837.76 and 386.12

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Solution

The fourth proportional to 607.40, 837.76 and 386.12 is: 532.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.40 : 837.76 = 386.12 : x
  2. Step 2: Convert to fraction form
    607.40/837.76 = 386.12/x
  3. Step 3: Cross multiply
    607.40x = 837.76 × 386.12
  4. Step 4: Simplify right side
    607.40x = 323,475.89
  5. Step 5: Solve for x
    x = 323,475.89/607.40
  6. Step 6: Final answer
    x = 532.56

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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.