Home / 639,280.89-959,077.47-212,815.89

Finding the Fourth Proportional to 639,280.89, 959,077.47 and 212,815.89

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Solution

The fourth proportional to 639,280.89, 959,077.47 and 212,815.89 is: 319,275.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,280.89 : 959,077.47 = 212,815.89 : x
  2. Step 2: Convert to fraction form
    639,280.89/959,077.47 = 212,815.89/x
  3. Step 3: Cross multiply
    639,280.89x = 959,077.47 × 212,815.89
  4. Step 4: Simplify right side
    639,280.89x = 204,106,925,357.00
  5. Step 5: Solve for x
    x = 204,106,925,357.00/639,280.89
  6. Step 6: Final answer
    x = 319,275.81

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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.