Home / 1,328,721.60-1,993,276.80-430,010.40

Finding the Fourth Proportional to 1,328,721.60, 1,993,276.80 and 430,010.40

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Solution

The fourth proportional to 1,328,721.60, 1,993,276.80 and 430,010.40 is: 645,078.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,721.60 : 1,993,276.80 = 430,010.40 : x
  2. Step 2: Convert to fraction form
    1,328,721.60/1,993,276.80 = 430,010.40/x
  3. Step 3: Cross multiply
    1,328,721.60x = 1,993,276.80 × 430,010.40
  4. Step 4: Simplify right side
    1,328,721.60x = 857,129,754,078.72
  5. Step 5: Solve for x
    x = 857,129,754,078.72/1,328,721.60
  6. Step 6: Final answer
    x = 645,078.51

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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.