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Finding the Fourth Proportional to 813.03, 1,121.99 and 440.01

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Solution

The fourth proportional to 813.03, 1,121.99 and 440.01 is: 607.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    813.03 : 1,121.99 = 440.01 : x
  2. Step 2: Convert to fraction form
    813.03/1,121.99 = 440.01/x
  3. Step 3: Cross multiply
    813.03x = 1,121.99 × 440.01
  4. Step 4: Simplify right side
    813.03x = 493,686.50
  5. Step 5: Solve for x
    x = 493,686.50/813.03
  6. Step 6: Final answer
    x = 607.22

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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.