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Finding the Fourth Proportional to 65.25, 98.25 and 56.46

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Solution

The fourth proportional to 65.25, 98.25 and 56.46 is: 85.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.25 : 98.25 = 56.46 : x
  2. Step 2: Convert to fraction form
    65.25/98.25 = 56.46/x
  3. Step 3: Cross multiply
    65.25x = 98.25 × 56.46
  4. Step 4: Simplify right side
    65.25x = 5,547.20
  5. Step 5: Solve for x
    x = 5,547.20/65.25
  6. Step 6: Final answer
    x = 85.01

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.