Home / 399,247,768.40-550,177,088.10-305,268,398.06

Finding the Fourth Proportional to 399,247,768.40, 550,177,088.10 and 305,268,398.06

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Solution

The fourth proportional to 399,247,768.40, 550,177,088.10 and 305,268,398.06 is: 420,670,299.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,247,768.40 : 550,177,088.10 = 305,268,398.06 : x
  2. Step 2: Convert to fraction form
    399,247,768.40/550,177,088.10 = 305,268,398.06/x
  3. Step 3: Cross multiply
    399,247,768.40x = 550,177,088.10 × 305,268,398.06
  4. Step 4: Simplify right side
    399,247,768.40x = 167,951,678,333,602,496
  5. Step 5: Solve for x
    x = 167,951,678,333,602,496/399,247,768.40
  6. Step 6: Final answer
    x = 420,670,299.57

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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.