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Finding the Fourth Proportional to 623.05, 859.24 and 511.87

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Solution

The fourth proportional to 623.05, 859.24 and 511.87 is: 705.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.05 : 859.24 = 511.87 : x
  2. Step 2: Convert to fraction form
    623.05/859.24 = 511.87/x
  3. Step 3: Cross multiply
    623.05x = 859.24 × 511.87
  4. Step 4: Simplify right side
    623.05x = 439,812.32
  5. Step 5: Solve for x
    x = 439,812.32/623.05
  6. Step 6: Final answer
    x = 705.91

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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.