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Finding the Fourth Proportional to 665,881.46, 918,303.59 and 436,355.39

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Solution

The fourth proportional to 665,881.46, 918,303.59 and 436,355.39 is: 601,768.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,881.46 : 918,303.59 = 436,355.39 : x
  2. Step 2: Convert to fraction form
    665,881.46/918,303.59 = 436,355.39/x
  3. Step 3: Cross multiply
    665,881.46x = 918,303.59 × 436,355.39
  4. Step 4: Simplify right side
    665,881.46x = 400,706,721,152.85
  5. Step 5: Solve for x
    x = 400,706,721,152.85/665,881.46
  6. Step 6: Final answer
    x = 601,768.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.