Home / 612,990.69-845,913.91-354,878.58

Finding the Fourth Proportional to 612,990.69, 845,913.91 and 354,878.58

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Solution

The fourth proportional to 612,990.69, 845,913.91 and 354,878.58 is: 489,724.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,990.69 : 845,913.91 = 354,878.58 : x
  2. Step 2: Convert to fraction form
    612,990.69/845,913.91 = 354,878.58/x
  3. Step 3: Cross multiply
    612,990.69x = 845,913.91 × 354,878.58
  4. Step 4: Simplify right side
    612,990.69x = 300,196,725,408.66
  5. Step 5: Solve for x
    x = 300,196,725,408.66/612,990.69
  6. Step 6: Final answer
    x = 489,724.77

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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.