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Finding the Fourth Proportional to 1,097,890.80, 1,643,628.60 and 782,962.80

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Solution

The fourth proportional to 1,097,890.80, 1,643,628.60 and 782,962.80 is: 1,172,156.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097,890.80 : 1,643,628.60 = 782,962.80 : x
  2. Step 2: Convert to fraction form
    1,097,890.80/1,643,628.60 = 782,962.80/x
  3. Step 3: Cross multiply
    1,097,890.80x = 1,643,628.60 × 782,962.80
  4. Step 4: Simplify right side
    1,097,890.80x = 1,286,900,050,816.08
  5. Step 5: Solve for x
    x = 1,286,900,050,816.08/1,097,890.80
  6. Step 6: Final answer
    x = 1,172,156.69

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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.