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Finding the Fourth Proportional to 605,428.80, 907,705.80 and 339,270.90

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Solution

The fourth proportional to 605,428.80, 907,705.80 and 339,270.90 is: 508,661.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,428.80 : 907,705.80 = 339,270.90 : x
  2. Step 2: Convert to fraction form
    605,428.80/907,705.80 = 339,270.90/x
  3. Step 3: Cross multiply
    605,428.80x = 907,705.80 × 339,270.90
  4. Step 4: Simplify right side
    605,428.80x = 307,958,163,701.22
  5. Step 5: Solve for x
    x = 307,958,163,701.22/605,428.80
  6. Step 6: Final answer
    x = 508,661.24

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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.