Home / 1,362,128.07-1,879,572.14-781,321.11

Finding the Fourth Proportional to 1,362,128.07, 1,879,572.14 and 781,321.11

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Solution

The fourth proportional to 1,362,128.07, 1,879,572.14 and 781,321.11 is: 1,078,128.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,362,128.07 : 1,879,572.14 = 781,321.11 : x
  2. Step 2: Convert to fraction form
    1,362,128.07/1,879,572.14 = 781,321.11/x
  3. Step 3: Cross multiply
    1,362,128.07x = 1,879,572.14 × 781,321.11
  4. Step 4: Simplify right side
    1,362,128.07x = 1,468,549,386,843.27
  5. Step 5: Solve for x
    x = 1,468,549,386,843.27/1,362,128.07
  6. Step 6: Final answer
    x = 1,078,128.72

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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.