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Finding the Fourth Proportional to 1,359.63, 2,039.81 and 435.15

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Solution

The fourth proportional to 1,359.63, 2,039.81 and 435.15 is: 652.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359.63 : 2,039.81 = 435.15 : x
  2. Step 2: Convert to fraction form
    1,359.63/2,039.81 = 435.15/x
  3. Step 3: Cross multiply
    1,359.63x = 2,039.81 × 435.15
  4. Step 4: Simplify right side
    1,359.63x = 887,621.15
  5. Step 5: Solve for x
    x = 887,621.15/1,359.63
  6. Step 6: Final answer
    x = 652.84

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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.