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Finding the Fourth Proportional to 306,060.21, 459,017.42 and 128,570.67

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Solution

The fourth proportional to 306,060.21, 459,017.42 and 128,570.67 is: 192,825.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,060.21 : 459,017.42 = 128,570.67 : x
  2. Step 2: Convert to fraction form
    306,060.21/459,017.42 = 128,570.67/x
  3. Step 3: Cross multiply
    306,060.21x = 459,017.42 × 128,570.67
  4. Step 4: Simplify right side
    306,060.21x = 59,016,176,588.22
  5. Step 5: Solve for x
    x = 59,016,176,588.22/306,060.21
  6. Step 6: Final answer
    x = 192,825.38

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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.