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Finding the Fourth Proportional to 1,063.93, 1,468.39 and 621.74

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Solution

The fourth proportional to 1,063.93, 1,468.39 and 621.74 is: 858.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,063.93 : 1,468.39 = 621.74 : x
  2. Step 2: Convert to fraction form
    1,063.93/1,468.39 = 621.74/x
  3. Step 3: Cross multiply
    1,063.93x = 1,468.39 × 621.74
  4. Step 4: Simplify right side
    1,063.93x = 912,961.25
  5. Step 5: Solve for x
    x = 912,961.25/1,063.93
  6. Step 6: Final answer
    x = 858.10

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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.