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Finding the Fourth Proportional to 654.40, 900.27 and 636.18

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Solution

The fourth proportional to 654.40, 900.27 and 636.18 is: 875.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.40 : 900.27 = 636.18 : x
  2. Step 2: Convert to fraction form
    654.40/900.27 = 636.18/x
  3. Step 3: Cross multiply
    654.40x = 900.27 × 636.18
  4. Step 4: Simplify right side
    654.40x = 572,733.77
  5. Step 5: Solve for x
    x = 572,733.77/654.40
  6. Step 6: Final answer
    x = 875.20

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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.