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Finding the Fourth Proportional to 305,687.76, 458,384.18 and 128,147.10

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Solution

The fourth proportional to 305,687.76, 458,384.18 and 128,147.10 is: 192,158.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,687.76 : 458,384.18 = 128,147.10 : x
  2. Step 2: Convert to fraction form
    305,687.76/458,384.18 = 128,147.10/x
  3. Step 3: Cross multiply
    305,687.76x = 458,384.18 × 128,147.10
  4. Step 4: Simplify right side
    305,687.76x = 58,740,602,712.14
  5. Step 5: Solve for x
    x = 58,740,602,712.14/305,687.76
  6. Step 6: Final answer
    x = 192,158.83

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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.