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Finding the Fourth Proportional to 228,605.52, 315,480.70 and 130,486.78

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Solution

The fourth proportional to 228,605.52, 315,480.70 and 130,486.78 is: 180,074.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,605.52 : 315,480.70 = 130,486.78 : x
  2. Step 2: Convert to fraction form
    228,605.52/315,480.70 = 130,486.78/x
  3. Step 3: Cross multiply
    228,605.52x = 315,480.70 × 130,486.78
  4. Step 4: Simplify right side
    228,605.52x = 41,166,060,695.15
  5. Step 5: Solve for x
    x = 41,166,060,695.15/228,605.52
  6. Step 6: Final answer
    x = 180,074.66

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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.