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Finding the Fourth Proportional to 900.58, 1,243.03 and 586.63

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Solution

The fourth proportional to 900.58, 1,243.03 and 586.63 is: 809.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.58 : 1,243.03 = 586.63 : x
  2. Step 2: Convert to fraction form
    900.58/1,243.03 = 586.63/x
  3. Step 3: Cross multiply
    900.58x = 1,243.03 × 586.63
  4. Step 4: Simplify right side
    900.58x = 729,198.69
  5. Step 5: Solve for x
    x = 729,198.69/900.58
  6. Step 6: Final answer
    x = 809.70

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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.