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Finding the Fourth Proportional to 368,817.12, 508,941.36 and 207,681.12

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Solution

The fourth proportional to 368,817.12, 508,941.36 and 207,681.12 is: 286,585.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,817.12 : 508,941.36 = 207,681.12 : x
  2. Step 2: Convert to fraction form
    368,817.12/508,941.36 = 207,681.12/x
  3. Step 3: Cross multiply
    368,817.12x = 508,941.36 × 207,681.12
  4. Step 4: Simplify right side
    368,817.12x = 105,697,511,659.12
  5. Step 5: Solve for x
    x = 105,697,511,659.12/368,817.12
  6. Step 6: Final answer
    x = 286,585.16

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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.