Home / 809,948.80-1,214,923.20-389,123.20

Finding the Fourth Proportional to 809,948.80, 1,214,923.20 and 389,123.20

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Solution

The fourth proportional to 809,948.80, 1,214,923.20 and 389,123.20 is: 583,684.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,948.80 : 1,214,923.20 = 389,123.20 : x
  2. Step 2: Convert to fraction form
    809,948.80/1,214,923.20 = 389,123.20/x
  3. Step 3: Cross multiply
    809,948.80x = 1,214,923.20 × 389,123.20
  4. Step 4: Simplify right side
    809,948.80x = 472,754,803,338.24
  5. Step 5: Solve for x
    x = 472,754,803,338.24/809,948.80
  6. Step 6: Final answer
    x = 583,684.80

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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.