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Finding the Fourth Proportional to 899.06, 1,239.55 and 583.77

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Solution

The fourth proportional to 899.06, 1,239.55 and 583.77 is: 804.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.06 : 1,239.55 = 583.77 : x
  2. Step 2: Convert to fraction form
    899.06/1,239.55 = 583.77/x
  3. Step 3: Cross multiply
    899.06x = 1,239.55 × 583.77
  4. Step 4: Simplify right side
    899.06x = 723,612.10
  5. Step 5: Solve for x
    x = 723,612.10/899.06
  6. Step 6: Final answer
    x = 804.85

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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.