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Finding the Fourth Proportional to 663.75, 915.95 and 369.01

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Solution

The fourth proportional to 663.75, 915.95 and 369.01 is: 509.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.75 : 915.95 = 369.01 : x
  2. Step 2: Convert to fraction form
    663.75/915.95 = 369.01/x
  3. Step 3: Cross multiply
    663.75x = 915.95 × 369.01
  4. Step 4: Simplify right side
    663.75x = 337,994.71
  5. Step 5: Solve for x
    x = 337,994.71/663.75
  6. Step 6: Final answer
    x = 509.22

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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.