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Finding the Fourth Proportional to 1,179.90, 1,628.15 and 900.32

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Solution

The fourth proportional to 1,179.90, 1,628.15 and 900.32 is: 1,242.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179.90 : 1,628.15 = 900.32 : x
  2. Step 2: Convert to fraction form
    1,179.90/1,628.15 = 900.32/x
  3. Step 3: Cross multiply
    1,179.90x = 1,628.15 × 900.32
  4. Step 4: Simplify right side
    1,179.90x = 1,465,843.37
  5. Step 5: Solve for x
    x = 1,465,843.37/1,179.90
  6. Step 6: Final answer
    x = 1,242.35

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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.