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Finding the Fourth Proportional to 621,699.60, 933,931.80 and 605,110.80

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Solution

The fourth proportional to 621,699.60, 933,931.80 and 605,110.80 is: 909,011.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,699.60 : 933,931.80 = 605,110.80 : x
  2. Step 2: Convert to fraction form
    621,699.60/933,931.80 = 605,110.80/x
  3. Step 3: Cross multiply
    621,699.60x = 933,931.80 × 605,110.80
  4. Step 4: Simplify right side
    621,699.60x = 565,132,218,643.44
  5. Step 5: Solve for x
    x = 565,132,218,643.44/621,699.60
  6. Step 6: Final answer
    x = 909,011.71

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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.