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Finding the Fourth Proportional to 286,993.98, 430,508.79 and 87,328.98

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Solution

The fourth proportional to 286,993.98, 430,508.79 and 87,328.98 is: 130,998.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,993.98 : 430,508.79 = 87,328.98 : x
  2. Step 2: Convert to fraction form
    286,993.98/430,508.79 = 87,328.98/x
  3. Step 3: Cross multiply
    286,993.98x = 430,508.79 × 87,328.98
  4. Step 4: Simplify right side
    286,993.98x = 37,595,893,511.73
  5. Step 5: Solve for x
    x = 37,595,893,511.73/286,993.98
  6. Step 6: Final answer
    x = 130,998.89

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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.