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Finding the Fourth Proportional to 900.64, 1,349.16 and 847.36

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Solution

The fourth proportional to 900.64, 1,349.16 and 847.36 is: 1,269.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.64 : 1,349.16 = 847.36 : x
  2. Step 2: Convert to fraction form
    900.64/1,349.16 = 847.36/x
  3. Step 3: Cross multiply
    900.64x = 1,349.16 × 847.36
  4. Step 4: Simplify right side
    900.64x = 1,143,224.22
  5. Step 5: Solve for x
    x = 1,143,224.22/900.64
  6. Step 6: Final answer
    x = 1,269.35

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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.