Home / 1,285,378.74-1,929,424.90-1,256,426.28

Finding the Fourth Proportional to 1,285,378.74, 1,929,424.90 and 1,256,426.28

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Solution

The fourth proportional to 1,285,378.74, 1,929,424.90 and 1,256,426.28 is: 1,885,965.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285,378.74 : 1,929,424.90 = 1,256,426.28 : x
  2. Step 2: Convert to fraction form
    1,285,378.74/1,929,424.90 = 1,256,426.28/x
  3. Step 3: Cross multiply
    1,285,378.74x = 1,929,424.90 × 1,256,426.28
  4. Step 4: Simplify right side
    1,285,378.74x = 2,424,180,149,646.37
  5. Step 5: Solve for x
    x = 2,424,180,149,646.37/1,285,378.74
  6. Step 6: Final answer
    x = 1,885,965.65

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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.