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Finding the Fourth Proportional to 506, 698.28 and 309.59

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Solution

The fourth proportional to 506, 698.28 and 309.59 is: 427.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    506 : 698.28 = 309.59 : x
  2. Step 2: Convert to fraction form
    506/698.28 = 309.59/x
  3. Step 3: Cross multiply
    506x = 698.28 × 309.59
  4. Step 4: Simplify right side
    506x = 216,180.51
  5. Step 5: Solve for x
    x = 216,180.51/506
  6. Step 6: Final answer
    x = 427.23

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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.