Home / 815,688.78-1,223,657.64-416,111.54

Finding the Fourth Proportional to 815,688.78, 1,223,657.64 and 416,111.54

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Solution

The fourth proportional to 815,688.78, 1,223,657.64 and 416,111.54 is: 624,230.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,688.78 : 1,223,657.64 = 416,111.54 : x
  2. Step 2: Convert to fraction form
    815,688.78/1,223,657.64 = 416,111.54/x
  3. Step 3: Cross multiply
    815,688.78x = 1,223,657.64 × 416,111.54
  4. Step 4: Simplify right side
    815,688.78x = 509,178,058,894.88
  5. Step 5: Solve for x
    x = 509,178,058,894.88/815,688.78
  6. Step 6: Final answer
    x = 624,230.80

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1.5x scale

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.