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Finding the Fourth Proportional to 888.63, 1,226.12 and 637.35

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Solution

The fourth proportional to 888.63, 1,226.12 and 637.35 is: 879.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.63 : 1,226.12 = 637.35 : x
  2. Step 2: Convert to fraction form
    888.63/1,226.12 = 637.35/x
  3. Step 3: Cross multiply
    888.63x = 1,226.12 × 637.35
  4. Step 4: Simplify right side
    888.63x = 781,464.40
  5. Step 5: Solve for x
    x = 781,464.40/888.63
  6. Step 6: Final answer
    x = 879.40

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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.