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Finding the Fourth Proportional to 305,673.48, 458,524.80 and 128,186.28

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Solution

The fourth proportional to 305,673.48, 458,524.80 and 128,186.28 is: 192,285.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,673.48 : 458,524.80 = 128,186.28 : x
  2. Step 2: Convert to fraction form
    305,673.48/458,524.80 = 128,186.28/x
  3. Step 3: Cross multiply
    305,673.48x = 458,524.80 × 128,186.28
  4. Step 4: Simplify right side
    305,673.48x = 58,776,588,399.74
  5. Step 5: Solve for x
    x = 58,776,588,399.74/305,673.48
  6. Step 6: Final answer
    x = 192,285.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.