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Finding the Fourth Proportional to 42.36, 58.40 and 33

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Solution

The fourth proportional to 42.36, 58.40 and 33 is: 45.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.36 : 58.40 = 33 : x
  2. Step 2: Convert to fraction form
    42.36/58.40 = 33/x
  3. Step 3: Cross multiply
    42.36x = 58.40 × 33
  4. Step 4: Simplify right side
    42.36x = 1,927.20
  5. Step 5: Solve for x
    x = 1,927.20/42.36
  6. Step 6: Final answer
    x = 45.50

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1.5x scale

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.