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Finding the Fourth Proportional to 369.99, 510.78 and 259.28

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Solution

The fourth proportional to 369.99, 510.78 and 259.28 is: 357.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.99 : 510.78 = 259.28 : x
  2. Step 2: Convert to fraction form
    369.99/510.78 = 259.28/x
  3. Step 3: Cross multiply
    369.99x = 510.78 × 259.28
  4. Step 4: Simplify right side
    369.99x = 132,433.21
  5. Step 5: Solve for x
    x = 132,433.21/369.99
  6. Step 6: Final answer
    x = 357.93

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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.