Home / 638,448.20-955,829.10-389,616.20

Finding the Fourth Proportional to 638,448.20, 955,829.10 and 389,616.20

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Solution

The fourth proportional to 638,448.20, 955,829.10 and 389,616.20 is: 583,299.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,448.20 : 955,829.10 = 389,616.20 : x
  2. Step 2: Convert to fraction form
    638,448.20/955,829.10 = 389,616.20/x
  3. Step 3: Cross multiply
    638,448.20x = 955,829.10 × 389,616.20
  4. Step 4: Simplify right side
    638,448.20x = 372,406,501,791.42
  5. Step 5: Solve for x
    x = 372,406,501,791.42/638,448.20
  6. Step 6: Final answer
    x = 583,299.48

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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.