Home / 390,408.03-538,740.72-215,967.83

Finding the Fourth Proportional to 390,408.03, 538,740.72 and 215,967.83

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Solution

The fourth proportional to 390,408.03, 538,740.72 and 215,967.83 is: 298,023.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,408.03 : 538,740.72 = 215,967.83 : x
  2. Step 2: Convert to fraction form
    390,408.03/538,740.72 = 215,967.83/x
  3. Step 3: Cross multiply
    390,408.03x = 538,740.72 × 215,967.83
  4. Step 4: Simplify right side
    390,408.03x = 116,350,661,537.33
  5. Step 5: Solve for x
    x = 116,350,661,537.33/390,408.03
  6. Step 6: Final answer
    x = 298,023.23

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1.5x scale

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.