Home / 1,328,659.20-1,993,280.40-430,142.40

Finding the Fourth Proportional to 1,328,659.20, 1,993,280.40 and 430,142.40

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Solution

The fourth proportional to 1,328,659.20, 1,993,280.40 and 430,142.40 is: 645,308.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,659.20 : 1,993,280.40 = 430,142.40 : x
  2. Step 2: Convert to fraction form
    1,328,659.20/1,993,280.40 = 430,142.40/x
  3. Step 3: Cross multiply
    1,328,659.20x = 1,993,280.40 × 430,142.40
  4. Step 4: Simplify right side
    1,328,659.20x = 857,394,415,128.96
  5. Step 5: Solve for x
    x = 857,394,415,128.96/1,328,659.20
  6. Step 6: Final answer
    x = 645,308.00

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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.