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Finding the Fourth Proportional to 436.08, 653.74 and 305.70

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Solution

The fourth proportional to 436.08, 653.74 and 305.70 is: 458.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.08 : 653.74 = 305.70 : x
  2. Step 2: Convert to fraction form
    436.08/653.74 = 305.70/x
  3. Step 3: Cross multiply
    436.08x = 653.74 × 305.70
  4. Step 4: Simplify right side
    436.08x = 199,848.32
  5. Step 5: Solve for x
    x = 199,848.32/436.08
  6. Step 6: Final answer
    x = 458.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.