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Finding the Fourth Proportional to 900.93, 1,243.80 and 651.99

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Solution

The fourth proportional to 900.93, 1,243.80 and 651.99 is: 900.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.93 : 1,243.80 = 651.99 : x
  2. Step 2: Convert to fraction form
    900.93/1,243.80 = 651.99/x
  3. Step 3: Cross multiply
    900.93x = 1,243.80 × 651.99
  4. Step 4: Simplify right side
    900.93x = 810,945.16
  5. Step 5: Solve for x
    x = 810,945.16/900.93
  6. Step 6: Final answer
    x = 900.12

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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.