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Finding the Fourth Proportional to 692,879.77, 956,164.69 and 386,961.60

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Solution

The fourth proportional to 692,879.77, 956,164.69 and 386,961.60 is: 534,001.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,879.77 : 956,164.69 = 386,961.60 : x
  2. Step 2: Convert to fraction form
    692,879.77/956,164.69 = 386,961.60/x
  3. Step 3: Cross multiply
    692,879.77x = 956,164.69 × 386,961.60
  4. Step 4: Simplify right side
    692,879.77x = 369,999,016,371.10
  5. Step 5: Solve for x
    x = 369,999,016,371.10/692,879.77
  6. Step 6: Final answer
    x = 534,001.76

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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.