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Finding the Fourth Proportional to 500.00, 745.08 and 485.91

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Solution

The fourth proportional to 500.00, 745.08 and 485.91 is: 724.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.00 : 745.08 = 485.91 : x
  2. Step 2: Convert to fraction form
    500.00/745.08 = 485.91/x
  3. Step 3: Cross multiply
    500.00x = 745.08 × 485.91
  4. Step 4: Simplify right side
    500.00x = 362,041.82
  5. Step 5: Solve for x
    x = 362,041.82/500.00
  6. Step 6: Final answer
    x = 724.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.