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Finding the Fourth Proportional to 421,687.72, 581,919.06 and 230,702.68

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Solution

The fourth proportional to 421,687.72, 581,919.06 and 230,702.68 is: 318,364.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,687.72 : 581,919.06 = 230,702.68 : x
  2. Step 2: Convert to fraction form
    421,687.72/581,919.06 = 230,702.68/x
  3. Step 3: Cross multiply
    421,687.72x = 581,919.06 × 230,702.68
  4. Step 4: Simplify right side
    421,687.72x = 134,250,286,685.08
  5. Step 5: Solve for x
    x = 134,250,286,685.08/421,687.72
  6. Step 6: Final answer
    x = 318,364.23

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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.