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Finding the Fourth Proportional to 607.50, 837.87 and 386.40

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Solution

The fourth proportional to 607.50, 837.87 and 386.40 is: 532.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.50 : 837.87 = 386.40 : x
  2. Step 2: Convert to fraction form
    607.50/837.87 = 386.40/x
  3. Step 3: Cross multiply
    607.50x = 837.87 × 386.40
  4. Step 4: Simplify right side
    607.50x = 323,752.97
  5. Step 5: Solve for x
    x = 323,752.97/607.50
  6. Step 6: Final answer
    x = 532.93

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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.