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Finding the Fourth Proportional to 605,140.40, 907,710.60 and 405,556.40

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Solution

The fourth proportional to 605,140.40, 907,710.60 and 405,556.40 is: 608,334.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,140.40 : 907,710.60 = 405,556.40 : x
  2. Step 2: Convert to fraction form
    605,140.40/907,710.60 = 405,556.40/x
  3. Step 3: Cross multiply
    605,140.40x = 907,710.60 × 405,556.40
  4. Step 4: Simplify right side
    605,140.40x = 368,127,843,177.84
  5. Step 5: Solve for x
    x = 368,127,843,177.84/605,140.40
  6. Step 6: Final answer
    x = 608,334.60

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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.