Home / 421,260.47-631,890.71-140,777.72

Finding the Fourth Proportional to 421,260.47, 631,890.71 and 140,777.72

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Solution

The fourth proportional to 421,260.47, 631,890.71 and 140,777.72 is: 211,166.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,260.47 : 631,890.71 = 140,777.72 : x
  2. Step 2: Convert to fraction form
    421,260.47/631,890.71 = 140,777.72/x
  3. Step 3: Cross multiply
    421,260.47x = 631,890.71 × 140,777.72
  4. Step 4: Simplify right side
    421,260.47x = 88,956,133,442.98
  5. Step 5: Solve for x
    x = 88,956,133,442.98/421,260.47
  6. Step 6: Final answer
    x = 211,166.58

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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.