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Finding the Fourth Proportional to 900.01, 1,349.06 and 438.11

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Solution

The fourth proportional to 900.01, 1,349.06 and 438.11 is: 656.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.01 : 1,349.06 = 438.11 : x
  2. Step 2: Convert to fraction form
    900.01/1,349.06 = 438.11/x
  3. Step 3: Cross multiply
    900.01x = 1,349.06 × 438.11
  4. Step 4: Simplify right side
    900.01x = 591,032.80
  5. Step 5: Solve for x
    x = 591,032.80/900.01
  6. Step 6: Final answer
    x = 656.69

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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.