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Finding the Fourth Proportional to 341,885.81, 512,848.79 and 128,655.54

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Solution

The fourth proportional to 341,885.81, 512,848.79 and 128,655.54 is: 192,990.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    341,885.81 : 512,848.79 = 128,655.54 : x
  2. Step 2: Convert to fraction form
    341,885.81/512,848.79 = 128,655.54/x
  3. Step 3: Cross multiply
    341,885.81x = 512,848.79 × 128,655.54
  4. Step 4: Simplify right side
    341,885.81x = 65,980,838,176.62
  5. Step 5: Solve for x
    x = 65,980,838,176.62/341,885.81
  6. Step 6: Final answer
    x = 192,990.86

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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.