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Finding the Fourth Proportional to 438.02, 656.12 and 351.50

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Solution

The fourth proportional to 438.02, 656.12 and 351.50 is: 526.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.02 : 656.12 = 351.50 : x
  2. Step 2: Convert to fraction form
    438.02/656.12 = 351.50/x
  3. Step 3: Cross multiply
    438.02x = 656.12 × 351.50
  4. Step 4: Simplify right side
    438.02x = 230,626.18
  5. Step 5: Solve for x
    x = 230,626.18/438.02
  6. Step 6: Final answer
    x = 526.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.