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Finding the Fourth Proportional to 660,536.70, 990,112.41 and 323,111.58

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Solution

The fourth proportional to 660,536.70, 990,112.41 and 323,111.58 is: 484,328.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,536.70 : 990,112.41 = 323,111.58 : x
  2. Step 2: Convert to fraction form
    660,536.70/990,112.41 = 323,111.58/x
  3. Step 3: Cross multiply
    660,536.70x = 990,112.41 × 323,111.58
  4. Step 4: Simplify right side
    660,536.70x = 319,916,785,172.71
  5. Step 5: Solve for x
    x = 319,916,785,172.71/660,536.70
  6. Step 6: Final answer
    x = 484,328.55

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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.