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Finding the Fourth Proportional to 53.90, 74.33 and 48.00

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Solution

The fourth proportional to 53.90, 74.33 and 48.00 is: 66.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.90 : 74.33 = 48.00 : x
  2. Step 2: Convert to fraction form
    53.90/74.33 = 48.00/x
  3. Step 3: Cross multiply
    53.90x = 74.33 × 48.00
  4. Step 4: Simplify right side
    53.90x = 3,567.23
  5. Step 5: Solve for x
    x = 3,567.23/53.90
  6. Step 6: Final answer
    x = 66.19

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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.