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Finding the Fourth Proportional to 2,077,978.10, 3,118,935.45 and 1,280,816.60

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Solution

The fourth proportional to 2,077,978.10, 3,118,935.45 and 1,280,816.60 is: 1,922,438.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,077,978.10 : 3,118,935.45 = 1,280,816.60 : x
  2. Step 2: Convert to fraction form
    2,077,978.10/3,118,935.45 = 1,280,816.60/x
  3. Step 3: Cross multiply
    2,077,978.10x = 3,118,935.45 × 1,280,816.60
  4. Step 4: Simplify right side
    2,077,978.10x = 3,994,784,298,688.47
  5. Step 5: Solve for x
    x = 3,994,784,298,688.47/2,077,978.10
  6. Step 6: Final answer
    x = 1,922,438.11

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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.