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Finding the Fourth Proportional to 64.03, 88.32 and 39.45

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Solution

The fourth proportional to 64.03, 88.32 and 39.45 is: 54.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.03 : 88.32 = 39.45 : x
  2. Step 2: Convert to fraction form
    64.03/88.32 = 39.45/x
  3. Step 3: Cross multiply
    64.03x = 88.32 × 39.45
  4. Step 4: Simplify right side
    64.03x = 3,483.96
  5. Step 5: Solve for x
    x = 3,483.96/64.03
  6. Step 6: Final answer
    x = 54.41

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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.