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Finding the Fourth Proportional to 1,210,366.80, 1,819,486.80 and 857,822.40

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Solution

The fourth proportional to 1,210,366.80, 1,819,486.80 and 857,822.40 is: 1,289,523.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210,366.80 : 1,819,486.80 = 857,822.40 : x
  2. Step 2: Convert to fraction form
    1,210,366.80/1,819,486.80 = 857,822.40/x
  3. Step 3: Cross multiply
    1,210,366.80x = 1,819,486.80 × 857,822.40
  4. Step 4: Simplify right side
    1,210,366.80x = 1,560,796,533,544.32
  5. Step 5: Solve for x
    x = 1,560,796,533,544.32/1,210,366.80
  6. Step 6: Final answer
    x = 1,289,523.58

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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.