Home / 998,784.28-1,498,012.39-430,012.23

Finding the Fourth Proportional to 998,784.28, 1,498,012.39 and 430,012.23

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Solution

The fourth proportional to 998,784.28, 1,498,012.39 and 430,012.23 is: 644,947.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    998,784.28 : 1,498,012.39 = 430,012.23 : x
  2. Step 2: Convert to fraction form
    998,784.28/1,498,012.39 = 430,012.23/x
  3. Step 3: Cross multiply
    998,784.28x = 1,498,012.39 × 430,012.23
  4. Step 4: Simplify right side
    998,784.28x = 644,163,648,391.53
  5. Step 5: Solve for x
    x = 644,163,648,391.53/998,784.28
  6. Step 6: Final answer
    x = 644,947.72

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Double scale
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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.