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Finding the Fourth Proportional to 217,406.63, 299,869.39 and 210,091.12

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Solution

The fourth proportional to 217,406.63, 299,869.39 and 210,091.12 is: 289,779.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,406.63 : 299,869.39 = 210,091.12 : x
  2. Step 2: Convert to fraction form
    217,406.63/299,869.39 = 210,091.12/x
  3. Step 3: Cross multiply
    217,406.63x = 299,869.39 × 210,091.12
  4. Step 4: Simplify right side
    217,406.63x = 62,999,895,511.76
  5. Step 5: Solve for x
    x = 62,999,895,511.76/217,406.63
  6. Step 6: Final answer
    x = 289,779.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.