Home / 645,087.75-890,243.93-354,721.41

Finding the Fourth Proportional to 645,087.75, 890,243.93 and 354,721.41

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Solution

The fourth proportional to 645,087.75, 890,243.93 and 354,721.41 is: 489,528.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,087.75 : 890,243.93 = 354,721.41 : x
  2. Step 2: Convert to fraction form
    645,087.75/890,243.93 = 354,721.41/x
  3. Step 3: Cross multiply
    645,087.75x = 890,243.93 × 354,721.41
  4. Step 4: Simplify right side
    645,087.75x = 315,788,582,980.35
  5. Step 5: Solve for x
    x = 315,788,582,980.35/645,087.75
  6. Step 6: Final answer
    x = 489,528.11

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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.