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Finding the Fourth Proportional to 1,272.32, 1,908.04 and 605.14

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Solution

The fourth proportional to 1,272.32, 1,908.04 and 605.14 is: 907.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.32 : 1,908.04 = 605.14 : x
  2. Step 2: Convert to fraction form
    1,272.32/1,908.04 = 605.14/x
  3. Step 3: Cross multiply
    1,272.32x = 1,908.04 × 605.14
  4. Step 4: Simplify right side
    1,272.32x = 1,154,631.33
  5. Step 5: Solve for x
    x = 1,154,631.33/1,272.32
  6. Step 6: Final answer
    x = 907.50

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.