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Finding the Fourth Proportional to 690.79, 953.27 and 376.06

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Solution

The fourth proportional to 690.79, 953.27 and 376.06 is: 518.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.79 : 953.27 = 376.06 : x
  2. Step 2: Convert to fraction form
    690.79/953.27 = 376.06/x
  3. Step 3: Cross multiply
    690.79x = 953.27 × 376.06
  4. Step 4: Simplify right side
    690.79x = 358,483.39
  5. Step 5: Solve for x
    x = 358,483.39/690.79
  6. Step 6: Final answer
    x = 518.95

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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.