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Finding the Fourth Proportional to 509,373.72, 764,016.39 and 172,406.88

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Solution

The fourth proportional to 509,373.72, 764,016.39 and 172,406.88 is: 258,595.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,373.72 : 764,016.39 = 172,406.88 : x
  2. Step 2: Convert to fraction form
    509,373.72/764,016.39 = 172,406.88/x
  3. Step 3: Cross multiply
    509,373.72x = 764,016.39 × 172,406.88
  4. Step 4: Simplify right side
    509,373.72x = 131,721,682,068.76
  5. Step 5: Solve for x
    x = 131,721,682,068.76/509,373.72
  6. Step 6: Final answer
    x = 258,595.36

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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.