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Finding the Fourth Proportional to 660,113.15, 990,161.82 and 210,828.02

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Solution

The fourth proportional to 660,113.15, 990,161.82 and 210,828.02 is: 316,239.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,113.15 : 990,161.82 = 210,828.02 : x
  2. Step 2: Convert to fraction form
    660,113.15/990,161.82 = 210,828.02/x
  3. Step 3: Cross multiply
    660,113.15x = 990,161.82 × 210,828.02
  4. Step 4: Simplify right side
    660,113.15x = 208,753,851,039.39
  5. Step 5: Solve for x
    x = 208,753,851,039.39/660,113.15
  6. Step 6: Final answer
    x = 316,239.50

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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.