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Finding the Fourth Proportional to 503.07, 750.79 and 490.11

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Solution

The fourth proportional to 503.07, 750.79 and 490.11 is: 731.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.07 : 750.79 = 490.11 : x
  2. Step 2: Convert to fraction form
    503.07/750.79 = 490.11/x
  3. Step 3: Cross multiply
    503.07x = 750.79 × 490.11
  4. Step 4: Simplify right side
    503.07x = 367,969.69
  5. Step 5: Solve for x
    x = 367,969.69/503.07
  6. Step 6: Final answer
    x = 731.45

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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.