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Finding the Fourth Proportional to 1,109,869.60, 1,664,804.40 and 991,674.40

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Solution

The fourth proportional to 1,109,869.60, 1,664,804.40 and 991,674.40 is: 1,487,511.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109,869.60 : 1,664,804.40 = 991,674.40 : x
  2. Step 2: Convert to fraction form
    1,109,869.60/1,664,804.40 = 991,674.40/x
  3. Step 3: Cross multiply
    1,109,869.60x = 1,664,804.40 × 991,674.40
  4. Step 4: Simplify right side
    1,109,869.60x = 1,650,943,904,487.36
  5. Step 5: Solve for x
    x = 1,650,943,904,487.36/1,109,869.60
  6. Step 6: Final answer
    x = 1,487,511.60

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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.