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Finding the Fourth Proportional to 692,007.72, 955,037.43 and 420,012.96

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Solution

The fourth proportional to 692,007.72, 955,037.43 and 420,012.96 is: 579,658.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,007.72 : 955,037.43 = 420,012.96 : x
  2. Step 2: Convert to fraction form
    692,007.72/955,037.43 = 420,012.96/x
  3. Step 3: Cross multiply
    692,007.72x = 955,037.43 × 420,012.96
  4. Step 4: Simplify right side
    692,007.72x = 401,128,097,885.09
  5. Step 5: Solve for x
    x = 401,128,097,885.09/692,007.72
  6. Step 6: Final answer
    x = 579,658.41

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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.