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Finding the Fourth Proportional to 605,421.07, 835,314.81 and 421,453.47

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Solution

The fourth proportional to 605,421.07, 835,314.81 and 421,453.47 is: 581,490.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,421.07 : 835,314.81 = 421,453.47 : x
  2. Step 2: Convert to fraction form
    605,421.07/835,314.81 = 421,453.47/x
  3. Step 3: Cross multiply
    605,421.07x = 835,314.81 × 421,453.47
  4. Step 4: Simplify right side
    605,421.07x = 352,046,325,216.89
  5. Step 5: Solve for x
    x = 352,046,325,216.89/605,421.07
  6. Step 6: Final answer
    x = 581,490.04

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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.