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Finding the Fourth Proportional to 616,918.36, 851,096.80 and 401,980

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Solution

The fourth proportional to 616,918.36, 851,096.80 and 401,980 is: 554,569.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    616,918.36 : 851,096.80 = 401,980 : x
  2. Step 2: Convert to fraction form
    616,918.36/851,096.80 = 401,980/x
  3. Step 3: Cross multiply
    616,918.36x = 851,096.80 × 401,980
  4. Step 4: Simplify right side
    616,918.36x = 342,123,891,664
  5. Step 5: Solve for x
    x = 342,123,891,664/616,918.36
  6. Step 6: Final answer
    x = 554,569.15

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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.