Home / 815,688.80-1,223,533.20-478,890.80

Finding the Fourth Proportional to 815,688.80, 1,223,533.20 and 478,890.80

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Solution

The fourth proportional to 815,688.80, 1,223,533.20 and 478,890.80 is: 718,336.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,688.80 : 1,223,533.20 = 478,890.80 : x
  2. Step 2: Convert to fraction form
    815,688.80/1,223,533.20 = 478,890.80/x
  3. Step 3: Cross multiply
    815,688.80x = 1,223,533.20 × 478,890.80
  4. Step 4: Simplify right side
    815,688.80x = 585,938,792,974.56
  5. Step 5: Solve for x
    x = 585,938,792,974.56/815,688.80
  6. Step 6: Final answer
    x = 718,336.20

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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.