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Finding the Fourth Proportional to 369.91, 510.42 and 210.39

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Solution

The fourth proportional to 369.91, 510.42 and 210.39 is: 290.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.91 : 510.42 = 210.39 : x
  2. Step 2: Convert to fraction form
    369.91/510.42 = 210.39/x
  3. Step 3: Cross multiply
    369.91x = 510.42 × 210.39
  4. Step 4: Simplify right side
    369.91x = 107,384.71
  5. Step 5: Solve for x
    x = 107,384.71/369.91
  6. Step 6: Final answer
    x = 290.30

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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.