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Finding the Fourth Proportional to 623.47, 858.90 and 436.61

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Solution

The fourth proportional to 623.47, 858.90 and 436.61 is: 601.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.47 : 858.90 = 436.61 : x
  2. Step 2: Convert to fraction form
    623.47/858.90 = 436.61/x
  3. Step 3: Cross multiply
    623.47x = 858.90 × 436.61
  4. Step 4: Simplify right side
    623.47x = 375,004.33
  5. Step 5: Solve for x
    x = 375,004.33/623.47
  6. Step 6: Final answer
    x = 601.48

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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.