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Finding the Fourth Proportional to 605,428.40, 908,142.60 and 538,943.60

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Solution

The fourth proportional to 605,428.40, 908,142.60 and 538,943.60 is: 808,415.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,428.40 : 908,142.60 = 538,943.60 : x
  2. Step 2: Convert to fraction form
    605,428.40/908,142.60 = 538,943.60/x
  3. Step 3: Cross multiply
    605,428.40x = 908,142.60 × 538,943.60
  4. Step 4: Simplify right side
    605,428.40x = 489,437,642,157.36
  5. Step 5: Solve for x
    x = 489,437,642,157.36/605,428.40
  6. Step 6: Final answer
    x = 808,415.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.