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Finding the Fourth Proportional to 623.61, 858.27 and 457.56

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Solution

The fourth proportional to 623.61, 858.27 and 457.56 is: 629.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.61 : 858.27 = 457.56 : x
  2. Step 2: Convert to fraction form
    623.61/858.27 = 457.56/x
  3. Step 3: Cross multiply
    623.61x = 858.27 × 457.56
  4. Step 4: Simplify right side
    623.61x = 392,710.02
  5. Step 5: Solve for x
    x = 392,710.02/623.61
  6. Step 6: Final answer
    x = 629.74

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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.