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Finding the Fourth Proportional to 421,634.49, 581,762.30 and 258,325.49

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Solution

The fourth proportional to 421,634.49, 581,762.30 and 258,325.49 is: 356,432.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,634.49 : 581,762.30 = 258,325.49 : x
  2. Step 2: Convert to fraction form
    421,634.49/581,762.30 = 258,325.49/x
  3. Step 3: Cross multiply
    421,634.49x = 581,762.30 × 258,325.49
  4. Step 4: Simplify right side
    421,634.49x = 150,284,027,010.59
  5. Step 5: Solve for x
    x = 150,284,027,010.59/421,634.49
  6. Step 6: Final answer
    x = 356,432.01

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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.