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Finding the Fourth Proportional to 690.59, 953.01 and 375.85

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Solution

The fourth proportional to 690.59, 953.01 and 375.85 is: 518.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.59 : 953.01 = 375.85 : x
  2. Step 2: Convert to fraction form
    690.59/953.01 = 375.85/x
  3. Step 3: Cross multiply
    690.59x = 953.01 × 375.85
  4. Step 4: Simplify right side
    690.59x = 358,188.81
  5. Step 5: Solve for x
    x = 358,188.81/690.59
  6. Step 6: Final answer
    x = 518.67

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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.