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Finding the Fourth Proportional to 557.65, 836.34 and 435.61

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Solution

The fourth proportional to 557.65, 836.34 and 435.61 is: 653.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.65 : 836.34 = 435.61 : x
  2. Step 2: Convert to fraction form
    557.65/836.34 = 435.61/x
  3. Step 3: Cross multiply
    557.65x = 836.34 × 435.61
  4. Step 4: Simplify right side
    557.65x = 364,318.07
  5. Step 5: Solve for x
    x = 364,318.07/557.65
  6. Step 6: Final answer
    x = 653.31

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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.