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Finding the Fourth Proportional to 1,063.19, 1,467.15 and 621.11

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Solution

The fourth proportional to 1,063.19, 1,467.15 and 621.11 is: 857.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,063.19 : 1,467.15 = 621.11 : x
  2. Step 2: Convert to fraction form
    1,063.19/1,467.15 = 621.11/x
  3. Step 3: Cross multiply
    1,063.19x = 1,467.15 × 621.11
  4. Step 4: Simplify right side
    1,063.19x = 911,261.54
  5. Step 5: Solve for x
    x = 911,261.54/1,063.19
  6. Step 6: Final answer
    x = 857.10

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Half scale
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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.