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Finding the Fourth Proportional to 428.99, 591.75 and 373.86

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Solution

The fourth proportional to 428.99, 591.75 and 373.86 is: 515.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    428.99 : 591.75 = 373.86 : x
  2. Step 2: Convert to fraction form
    428.99/591.75 = 373.86/x
  3. Step 3: Cross multiply
    428.99x = 591.75 × 373.86
  4. Step 4: Simplify right side
    428.99x = 221,231.27
  5. Step 5: Solve for x
    x = 221,231.27/428.99
  6. Step 6: Final answer
    x = 515.70

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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.