Home / 389,421.60-537,408.78-228,392.76

Finding the Fourth Proportional to 389,421.60, 537,408.78 and 228,392.76

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Solution

The fourth proportional to 389,421.60, 537,408.78 and 228,392.76 is: 315,186.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,421.60 : 537,408.78 = 228,392.76 : x
  2. Step 2: Convert to fraction form
    389,421.60/537,408.78 = 228,392.76/x
  3. Step 3: Cross multiply
    389,421.60x = 537,408.78 × 228,392.76
  4. Step 4: Simplify right side
    389,421.60x = 122,740,274,512.43
  5. Step 5: Solve for x
    x = 122,740,274,512.43/389,421.60
  6. Step 6: Final answer
    x = 315,186.10

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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.