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Finding the Fourth Proportional to 802,980, 1,108,112.40 and 445,284

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Solution

The fourth proportional to 802,980, 1,108,112.40 and 445,284 is: 614,491.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    802,980 : 1,108,112.40 = 445,284 : x
  2. Step 2: Convert to fraction form
    802,980/1,108,112.40 = 445,284/x
  3. Step 3: Cross multiply
    802,980x = 1,108,112.40 × 445,284
  4. Step 4: Simplify right side
    802,980x = 493,424,721,921.60
  5. Step 5: Solve for x
    x = 493,424,721,921.60/802,980
  6. Step 6: Final answer
    x = 614,491.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.