Home / 1,422,957.21-1,963,655.15-778,371.76

Finding the Fourth Proportional to 1,422,957.21, 1,963,655.15 and 778,371.76

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Solution

The fourth proportional to 1,422,957.21, 1,963,655.15 and 778,371.76 is: 1,074,138.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422,957.21 : 1,963,655.15 = 778,371.76 : x
  2. Step 2: Convert to fraction form
    1,422,957.21/1,963,655.15 = 778,371.76/x
  3. Step 3: Cross multiply
    1,422,957.21x = 1,963,655.15 × 778,371.76
  4. Step 4: Simplify right side
    1,422,957.21x = 1,528,453,715,138.56
  5. Step 5: Solve for x
    x = 1,528,453,715,138.56/1,422,957.21
  6. Step 6: Final answer
    x = 1,074,138.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.