Home / 612,990.40-845,913.55-354,878.25

Finding the Fourth Proportional to 612,990.40, 845,913.55 and 354,878.25

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Solution

The fourth proportional to 612,990.40, 845,913.55 and 354,878.25 is: 489,724.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,990.40 : 845,913.55 = 354,878.25 : x
  2. Step 2: Convert to fraction form
    612,990.40/845,913.55 = 354,878.25/x
  3. Step 3: Cross multiply
    612,990.40x = 845,913.55 × 354,878.25
  4. Step 4: Simplify right side
    612,990.40x = 300,196,318,500.90
  5. Step 5: Solve for x
    x = 300,196,318,500.90/612,990.40
  6. Step 6: Final answer
    x = 489,724.34

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1.5x scale

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.