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Finding the Fourth Proportional to 228,365.28, 315,139.68 and 126,390.74

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Solution

The fourth proportional to 228,365.28, 315,139.68 and 126,390.74 is: 174,416.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,365.28 : 315,139.68 = 126,390.74 : x
  2. Step 2: Convert to fraction form
    228,365.28/315,139.68 = 126,390.74/x
  3. Step 3: Cross multiply
    228,365.28x = 315,139.68 × 126,390.74
  4. Step 4: Simplify right side
    228,365.28x = 39,830,735,782.86
  5. Step 5: Solve for x
    x = 39,830,735,782.86/228,365.28
  6. Step 6: Final answer
    x = 174,416.78

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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.