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Finding the Fourth Proportional to 656,134.72, 905,443.74 and 401,485.90

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Solution

The fourth proportional to 656,134.72, 905,443.74 and 401,485.90 is: 554,036.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,134.72 : 905,443.74 = 401,485.90 : x
  2. Step 2: Convert to fraction form
    656,134.72/905,443.74 = 401,485.90/x
  3. Step 3: Cross multiply
    656,134.72x = 905,443.74 × 401,485.90
  4. Step 4: Simplify right side
    656,134.72x = 363,522,894,853.27
  5. Step 5: Solve for x
    x = 363,522,894,853.27/656,134.72
  6. Step 6: Final answer
    x = 554,036.97

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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.