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Finding the Fourth Proportional to 623.93, 858.42 and 540.55

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Solution

The fourth proportional to 623.93, 858.42 and 540.55 is: 743.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.93 : 858.42 = 540.55 : x
  2. Step 2: Convert to fraction form
    623.93/858.42 = 540.55/x
  3. Step 3: Cross multiply
    623.93x = 858.42 × 540.55
  4. Step 4: Simplify right side
    623.93x = 464,018.93
  5. Step 5: Solve for x
    x = 464,018.93/623.93
  6. Step 6: Final answer
    x = 743.70

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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.