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Finding the Fourth Proportional to 421,263.36, 581,406.72 and 242,380.80

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Solution

The fourth proportional to 421,263.36, 581,406.72 and 242,380.80 is: 334,521.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,263.36 : 581,406.72 = 242,380.80 : x
  2. Step 2: Convert to fraction form
    421,263.36/581,406.72 = 242,380.80/x
  3. Step 3: Cross multiply
    421,263.36x = 581,406.72 × 242,380.80
  4. Step 4: Simplify right side
    421,263.36x = 140,921,825,918.98
  5. Step 5: Solve for x
    x = 140,921,825,918.98/421,263.36
  6. Step 6: Final answer
    x = 334,521.92

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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.