Home / 1,285,281.20-1,927,921.80-812,889.20

Finding the Fourth Proportional to 1,285,281.20, 1,927,921.80 and 812,889.20

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Solution

The fourth proportional to 1,285,281.20, 1,927,921.80 and 812,889.20 is: 1,219,333.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285,281.20 : 1,927,921.80 = 812,889.20 : x
  2. Step 2: Convert to fraction form
    1,285,281.20/1,927,921.80 = 812,889.20/x
  3. Step 3: Cross multiply
    1,285,281.20x = 1,927,921.80 × 812,889.20
  4. Step 4: Simplify right side
    1,285,281.20x = 1,567,186,809,664.56
  5. Step 5: Solve for x
    x = 1,567,186,809,664.56/1,285,281.20
  6. Step 6: Final answer
    x = 1,219,333.80

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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.