Home / 679,920.94-1,019,421.33-380,608.12

Finding the Fourth Proportional to 679,920.94, 1,019,421.33 and 380,608.12

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Solution

The fourth proportional to 679,920.94, 1,019,421.33 and 380,608.12 is: 570,654.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,920.94 : 1,019,421.33 = 380,608.12 : x
  2. Step 2: Convert to fraction form
    679,920.94/1,019,421.33 = 380,608.12/x
  3. Step 3: Cross multiply
    679,920.94x = 1,019,421.33 × 380,608.12
  4. Step 4: Simplify right side
    679,920.94x = 388,000,035,899.20
  5. Step 5: Solve for x
    x = 388,000,035,899.20/679,920.94
  6. Step 6: Final answer
    x = 570,654.64

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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.