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Finding the Fourth Proportional to 660,351.34, 990,478.56 and 210,951.53

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Solution

The fourth proportional to 660,351.34, 990,478.56 and 210,951.53 is: 316,411.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,351.34 : 990,478.56 = 210,951.53 : x
  2. Step 2: Convert to fraction form
    660,351.34/990,478.56 = 210,951.53/x
  3. Step 3: Cross multiply
    660,351.34x = 990,478.56 × 210,951.53
  4. Step 4: Simplify right side
    660,351.34x = 208,942,962,711.80
  5. Step 5: Solve for x
    x = 208,942,962,711.80/660,351.34
  6. Step 6: Final answer
    x = 316,411.81

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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.