Home / 821,640.40-1,232,460.60-489,864.40

Finding the Fourth Proportional to 821,640.40, 1,232,460.60 and 489,864.40

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Solution

The fourth proportional to 821,640.40, 1,232,460.60 and 489,864.40 is: 734,796.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,640.40 : 1,232,460.60 = 489,864.40 : x
  2. Step 2: Convert to fraction form
    821,640.40/1,232,460.60 = 489,864.40/x
  3. Step 3: Cross multiply
    821,640.40x = 1,232,460.60 × 489,864.40
  4. Step 4: Simplify right side
    821,640.40x = 603,738,572,342.64
  5. Step 5: Solve for x
    x = 603,738,572,342.64/821,640.40
  6. Step 6: Final answer
    x = 734,796.60

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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.