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Finding the Fourth Proportional to 1,360.14, 2,040.18 and 435.68

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Solution

The fourth proportional to 1,360.14, 2,040.18 and 435.68 is: 653.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,360.14 : 2,040.18 = 435.68 : x
  2. Step 2: Convert to fraction form
    1,360.14/2,040.18 = 435.68/x
  3. Step 3: Cross multiply
    1,360.14x = 2,040.18 × 435.68
  4. Step 4: Simplify right side
    1,360.14x = 888,865.62
  5. Step 5: Solve for x
    x = 888,865.62/1,360.14
  6. Step 6: Final answer
    x = 653.51

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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.