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Finding the Fourth Proportional to 228,288.55, 315,164.90 and 137,667.47

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Solution

The fourth proportional to 228,288.55, 315,164.90 and 137,667.47 is: 190,057.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,288.55 : 315,164.90 = 137,667.47 : x
  2. Step 2: Convert to fraction form
    228,288.55/315,164.90 = 137,667.47/x
  3. Step 3: Cross multiply
    228,288.55x = 315,164.90 × 137,667.47
  4. Step 4: Simplify right side
    228,288.55x = 43,387,955,031.63
  5. Step 5: Solve for x
    x = 43,387,955,031.63/228,288.55
  6. Step 6: Final answer
    x = 190,057.52

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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.