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Finding the Fourth Proportional to 605,109.60, 907,858.80 and 405,655.20

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Solution

The fourth proportional to 605,109.60, 907,858.80 and 405,655.20 is: 608,613.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,109.60 : 907,858.80 = 405,655.20 : x
  2. Step 2: Convert to fraction form
    605,109.60/907,858.80 = 405,655.20/x
  3. Step 3: Cross multiply
    605,109.60x = 907,858.80 × 405,655.20
  4. Step 4: Simplify right side
    605,109.60x = 368,277,643,085.76
  5. Step 5: Solve for x
    x = 368,277,643,085.76/605,109.60
  6. Step 6: Final answer
    x = 608,613.12

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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.