Home / 1,287,200.80-1,930,801.20-340,667.20

Finding the Fourth Proportional to 1,287,200.80, 1,930,801.20 and 340,667.20

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Solution

The fourth proportional to 1,287,200.80, 1,930,801.20 and 340,667.20 is: 511,000.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,200.80 : 1,930,801.20 = 340,667.20 : x
  2. Step 2: Convert to fraction form
    1,287,200.80/1,930,801.20 = 340,667.20/x
  3. Step 3: Cross multiply
    1,287,200.80x = 1,930,801.20 × 340,667.20
  4. Step 4: Simplify right side
    1,287,200.80x = 657,760,638,560.64
  5. Step 5: Solve for x
    x = 657,760,638,560.64/1,287,200.80
  6. Step 6: Final answer
    x = 511,000.80

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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.