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Finding the Fourth Proportional to 730.84, 1,007.76 and 620.14

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Solution

The fourth proportional to 730.84, 1,007.76 and 620.14 is: 855.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.84 : 1,007.76 = 620.14 : x
  2. Step 2: Convert to fraction form
    730.84/1,007.76 = 620.14/x
  3. Step 3: Cross multiply
    730.84x = 1,007.76 × 620.14
  4. Step 4: Simplify right side
    730.84x = 624,952.29
  5. Step 5: Solve for x
    x = 624,952.29/730.84
  6. Step 6: Final answer
    x = 855.12

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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.