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Finding the Fourth Proportional to 286,040.70, 428,866.65 and 108,521.10

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Solution

The fourth proportional to 286,040.70, 428,866.65 and 108,521.10 is: 162,707.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,040.70 : 428,866.65 = 108,521.10 : x
  2. Step 2: Convert to fraction form
    286,040.70/428,866.65 = 108,521.10/x
  3. Step 3: Cross multiply
    286,040.70x = 428,866.65 × 108,521.10
  4. Step 4: Simplify right side
    286,040.70x = 46,541,080,611.32
  5. Step 5: Solve for x
    x = 46,541,080,611.32/286,040.70
  6. Step 6: Final answer
    x = 162,707.90

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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.