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Finding the Fourth Proportional to 945.56, 1,303.94 and 890.88

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Solution

The fourth proportional to 945.56, 1,303.94 and 890.88 is: 1,228.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.56 : 1,303.94 = 890.88 : x
  2. Step 2: Convert to fraction form
    945.56/1,303.94 = 890.88/x
  3. Step 3: Cross multiply
    945.56x = 1,303.94 × 890.88
  4. Step 4: Simplify right side
    945.56x = 1,161,649.61
  5. Step 5: Solve for x
    x = 1,161,649.61/945.56
  6. Step 6: Final answer
    x = 1,228.54

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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.