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Finding the Fourth Proportional to 692,647.24, 955,843.90 and 386,728.32

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Solution

The fourth proportional to 692,647.24, 955,843.90 and 386,728.32 is: 533,679.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,647.24 : 955,843.90 = 386,728.32 : x
  2. Step 2: Convert to fraction form
    692,647.24/955,843.90 = 386,728.32/x
  3. Step 3: Cross multiply
    692,647.24x = 955,843.90 × 386,728.32
  4. Step 4: Simplify right side
    692,647.24x = 369,651,905,629.25
  5. Step 5: Solve for x
    x = 369,651,905,629.25/692,647.24
  6. Step 6: Final answer
    x = 533,679.89

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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.