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Finding the Fourth Proportional to 306,009.80, 458,139.90 and 187,911.80

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Solution

The fourth proportional to 306,009.80, 458,139.90 and 187,911.80 is: 281,330.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,009.80 : 458,139.90 = 187,911.80 : x
  2. Step 2: Convert to fraction form
    306,009.80/458,139.90 = 187,911.80/x
  3. Step 3: Cross multiply
    306,009.80x = 458,139.90 × 187,911.80
  4. Step 4: Simplify right side
    306,009.80x = 86,089,893,260.82
  5. Step 5: Solve for x
    x = 86,089,893,260.82/306,009.80
  6. Step 6: Final answer
    x = 281,330.51

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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.