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Finding the Fourth Proportional to 646.36, 891.52 and 624.93

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Solution

The fourth proportional to 646.36, 891.52 and 624.93 is: 861.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.36 : 891.52 = 624.93 : x
  2. Step 2: Convert to fraction form
    646.36/891.52 = 624.93/x
  3. Step 3: Cross multiply
    646.36x = 891.52 × 624.93
  4. Step 4: Simplify right side
    646.36x = 557,137.59
  5. Step 5: Solve for x
    x = 557,137.59/646.36
  6. Step 6: Final answer
    x = 861.96

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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.