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Finding the Fourth Proportional to 639,009.10, 957,699.60 and 339,633.10

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Solution

The fourth proportional to 639,009.10, 957,699.60 and 339,633.10 is: 509,016.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,009.10 : 957,699.60 = 339,633.10 : x
  2. Step 2: Convert to fraction form
    639,009.10/957,699.60 = 339,633.10/x
  3. Step 3: Cross multiply
    639,009.10x = 957,699.60 × 339,633.10
  4. Step 4: Simplify right side
    639,009.10x = 325,266,484,016.76
  5. Step 5: Solve for x
    x = 325,266,484,016.76/639,009.10
  6. Step 6: Final answer
    x = 509,016.98

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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.