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Finding the Fourth Proportional to 623.75, 859.83 and 513.03

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Solution

The fourth proportional to 623.75, 859.83 and 513.03 is: 707.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.75 : 859.83 = 513.03 : x
  2. Step 2: Convert to fraction form
    623.75/859.83 = 513.03/x
  3. Step 3: Cross multiply
    623.75x = 859.83 × 513.03
  4. Step 4: Simplify right side
    623.75x = 441,122.77
  5. Step 5: Solve for x
    x = 441,122.77/623.75
  6. Step 6: Final answer
    x = 707.21

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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.