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Finding the Fourth Proportional to 605,423.07, 835,317.57 and 421,455.47

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Solution

The fourth proportional to 605,423.07, 835,317.57 and 421,455.47 is: 581,492.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,423.07 : 835,317.57 = 421,455.47 : x
  2. Step 2: Convert to fraction form
    605,423.07/835,317.57 = 421,455.47/x
  3. Step 3: Cross multiply
    605,423.07x = 835,317.57 × 421,455.47
  4. Step 4: Simplify right side
    605,423.07x = 352,049,159,063.61
  5. Step 5: Solve for x
    x = 352,049,159,063.61/605,423.07
  6. Step 6: Final answer
    x = 581,492.80

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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.