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Finding the Fourth Proportional to 613,948.40, 921,021.01 and 259,014.70

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Solution

The fourth proportional to 613,948.40, 921,021.01 and 259,014.70 is: 388,563.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,948.40 : 921,021.01 = 259,014.70 : x
  2. Step 2: Convert to fraction form
    613,948.40/921,021.01 = 259,014.70/x
  3. Step 3: Cross multiply
    613,948.40x = 921,021.01 × 259,014.70
  4. Step 4: Simplify right side
    613,948.40x = 238,557,980,598.85
  5. Step 5: Solve for x
    x = 238,557,980,598.85/613,948.40
  6. Step 6: Final answer
    x = 388,563.57

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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.