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Finding the Fourth Proportional to 627.51, 865.53 and 448.35

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Solution

The fourth proportional to 627.51, 865.53 and 448.35 is: 618.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.51 : 865.53 = 448.35 : x
  2. Step 2: Convert to fraction form
    627.51/865.53 = 448.35/x
  3. Step 3: Cross multiply
    627.51x = 865.53 × 448.35
  4. Step 4: Simplify right side
    627.51x = 388,060.38
  5. Step 5: Solve for x
    x = 388,060.38/627.51
  6. Step 6: Final answer
    x = 618.41

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Double scale
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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.