Home / 1,319,153.80-1,978,730.70-321,881.80

Finding the Fourth Proportional to 1,319,153.80, 1,978,730.70 and 321,881.80

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Solution

The fourth proportional to 1,319,153.80, 1,978,730.70 and 321,881.80 is: 482,822.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,153.80 : 1,978,730.70 = 321,881.80 : x
  2. Step 2: Convert to fraction form
    1,319,153.80/1,978,730.70 = 321,881.80/x
  3. Step 3: Cross multiply
    1,319,153.80x = 1,978,730.70 × 321,881.80
  4. Step 4: Simplify right side
    1,319,153.80x = 636,917,399,431.26
  5. Step 5: Solve for x
    x = 636,917,399,431.26/1,319,153.80
  6. Step 6: Final answer
    x = 482,822.70

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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.