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Finding the Fourth Proportional to 1,014.99, 1,400.13 and 621.33

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Solution

The fourth proportional to 1,014.99, 1,400.13 and 621.33 is: 857.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.99 : 1,400.13 = 621.33 : x
  2. Step 2: Convert to fraction form
    1,014.99/1,400.13 = 621.33/x
  3. Step 3: Cross multiply
    1,014.99x = 1,400.13 × 621.33
  4. Step 4: Simplify right side
    1,014.99x = 869,942.77
  5. Step 5: Solve for x
    x = 869,942.77/1,014.99
  6. Step 6: Final answer
    x = 857.09

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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.