Home / 397,128.41-548,041.40-215,840.39

Finding the Fourth Proportional to 397,128.41, 548,041.40 and 215,840.39

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Solution

The fourth proportional to 397,128.41, 548,041.40 and 215,840.39 is: 297,862.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,128.41 : 548,041.40 = 215,840.39 : x
  2. Step 2: Convert to fraction form
    397,128.41/548,041.40 = 215,840.39/x
  3. Step 3: Cross multiply
    397,128.41x = 548,041.40 × 215,840.39
  4. Step 4: Simplify right side
    397,128.41x = 118,289,465,692.74
  5. Step 5: Solve for x
    x = 118,289,465,692.74/397,128.41
  6. Step 6: Final answer
    x = 297,862.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.