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Finding the Fourth Proportional to 611,728.40, 844,156.60 and 339,813.80

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Solution

The fourth proportional to 611,728.40, 844,156.60 and 339,813.80 is: 468,927.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,728.40 : 844,156.60 = 339,813.80 : x
  2. Step 2: Convert to fraction form
    611,728.40/844,156.60 = 339,813.80/x
  3. Step 3: Cross multiply
    611,728.40x = 844,156.60 × 339,813.80
  4. Step 4: Simplify right side
    611,728.40x = 286,856,062,041.08
  5. Step 5: Solve for x
    x = 286,856,062,041.08/611,728.40
  6. Step 6: Final answer
    x = 468,927.16

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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.