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Finding the Fourth Proportional to 1,095.92, 1,643.88 and 412.08

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Solution

The fourth proportional to 1,095.92, 1,643.88 and 412.08 is: 618.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,095.92 : 1,643.88 = 412.08 : x
  2. Step 2: Convert to fraction form
    1,095.92/1,643.88 = 412.08/x
  3. Step 3: Cross multiply
    1,095.92x = 1,643.88 × 412.08
  4. Step 4: Simplify right side
    1,095.92x = 677,410.07
  5. Step 5: Solve for x
    x = 677,410.07/1,095.92
  6. Step 6: Final answer
    x = 618.12

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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.