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Finding the Fourth Proportional to 622.55, 858.55 and 511.37

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Solution

The fourth proportional to 622.55, 858.55 and 511.37 is: 705.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.55 : 858.55 = 511.37 : x
  2. Step 2: Convert to fraction form
    622.55/858.55 = 511.37/x
  3. Step 3: Cross multiply
    622.55x = 858.55 × 511.37
  4. Step 4: Simplify right side
    622.55x = 439,031.14
  5. Step 5: Solve for x
    x = 439,031.14/622.55
  6. Step 6: Final answer
    x = 705.22

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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.