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Finding the Fourth Proportional to 908,406.09, 1,362,646.80 and 339,730.20

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Solution

The fourth proportional to 908,406.09, 1,362,646.80 and 339,730.20 is: 509,609.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    908,406.09 : 1,362,646.80 = 339,730.20 : x
  2. Step 2: Convert to fraction form
    908,406.09/1,362,646.80 = 339,730.20/x
  3. Step 3: Cross multiply
    908,406.09x = 1,362,646.80 × 339,730.20
  4. Step 4: Simplify right side
    908,406.09x = 462,932,269,893.36
  5. Step 5: Solve for x
    x = 462,932,269,893.36/908,406.09
  6. Step 6: Final answer
    x = 509,609.39

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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.