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Finding the Fourth Proportional to 623.70, 859.82 and 483.57

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Solution

The fourth proportional to 623.70, 859.82 and 483.57 is: 666.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.70 : 859.82 = 483.57 : x
  2. Step 2: Convert to fraction form
    623.70/859.82 = 483.57/x
  3. Step 3: Cross multiply
    623.70x = 859.82 × 483.57
  4. Step 4: Simplify right side
    623.70x = 415,780.74
  5. Step 5: Solve for x
    x = 415,780.74/623.70
  6. Step 6: Final answer
    x = 666.64

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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.