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Finding the Fourth Proportional to 605,438.40, 907,509.60 and 205,708.80

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Solution

The fourth proportional to 605,438.40, 907,509.60 and 205,708.80 is: 308,343.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,438.40 : 907,509.60 = 205,708.80 : x
  2. Step 2: Convert to fraction form
    605,438.40/907,509.60 = 205,708.80/x
  3. Step 3: Cross multiply
    605,438.40x = 907,509.60 × 205,708.80
  4. Step 4: Simplify right side
    605,438.40x = 186,682,710,804.48
  5. Step 5: Solve for x
    x = 186,682,710,804.48/605,438.40
  6. Step 6: Final answer
    x = 308,343.03

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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.