Home / 1,393,109.16-1,922,356.20-781,287

Finding the Fourth Proportional to 1,393,109.16, 1,922,356.20 and 781,287

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Solution

The fourth proportional to 1,393,109.16, 1,922,356.20 and 781,287 is: 1,078,100.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393,109.16 : 1,922,356.20 = 781,287 : x
  2. Step 2: Convert to fraction form
    1,393,109.16/1,922,356.20 = 781,287/x
  3. Step 3: Cross multiply
    1,393,109.16x = 1,922,356.20 × 781,287
  4. Step 4: Simplify right side
    1,393,109.16x = 1,501,911,908,429.40
  5. Step 5: Solve for x
    x = 1,501,911,908,429.40/1,393,109.16
  6. Step 6: Final answer
    x = 1,078,100.66

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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.