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Finding the Fourth Proportional to 309,403.77, 426,996.93 and 173,437.77

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Solution

The fourth proportional to 309,403.77, 426,996.93 and 173,437.77 is: 239,355.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,403.77 : 426,996.93 = 173,437.77 : x
  2. Step 2: Convert to fraction form
    309,403.77/426,996.93 = 173,437.77/x
  3. Step 3: Cross multiply
    309,403.77x = 426,996.93 × 173,437.77
  4. Step 4: Simplify right side
    309,403.77x = 74,057,395,336.05
  5. Step 5: Solve for x
    x = 74,057,395,336.05/309,403.77
  6. Step 6: Final answer
    x = 239,355.18

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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.