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Finding the Fourth Proportional to 348,030.80, 520,879.80 and 306,040.40

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Solution

The fourth proportional to 348,030.80, 520,879.80 and 306,040.40 is: 458,034.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,030.80 : 520,879.80 = 306,040.40 : x
  2. Step 2: Convert to fraction form
    348,030.80/520,879.80 = 306,040.40/x
  3. Step 3: Cross multiply
    348,030.80x = 520,879.80 × 306,040.40
  4. Step 4: Simplify right side
    348,030.80x = 159,410,262,343.92
  5. Step 5: Solve for x
    x = 159,410,262,343.92/348,030.80
  6. Step 6: Final answer
    x = 458,034.93

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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.