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Finding the Fourth Proportional to 817.21, 1,127.77 and 444.19

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Solution

The fourth proportional to 817.21, 1,127.77 and 444.19 is: 612.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    817.21 : 1,127.77 = 444.19 : x
  2. Step 2: Convert to fraction form
    817.21/1,127.77 = 444.19/x
  3. Step 3: Cross multiply
    817.21x = 1,127.77 × 444.19
  4. Step 4: Simplify right side
    817.21x = 500,938.52
  5. Step 5: Solve for x
    x = 500,938.52/817.21
  6. Step 6: Final answer
    x = 612.99

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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.