Home / 319,619.40-478,991.70-212,699.40

Finding the Fourth Proportional to 319,619.40, 478,991.70 and 212,699.40

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Solution

The fourth proportional to 319,619.40, 478,991.70 and 212,699.40 is: 318,758.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,619.40 : 478,991.70 = 212,699.40 : x
  2. Step 2: Convert to fraction form
    319,619.40/478,991.70 = 212,699.40/x
  3. Step 3: Cross multiply
    319,619.40x = 478,991.70 × 212,699.40
  4. Step 4: Simplify right side
    319,619.40x = 101,881,247,194.98
  5. Step 5: Solve for x
    x = 101,881,247,194.98/319,619.40
  6. Step 6: Final answer
    x = 318,758.02

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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.