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Finding the Fourth Proportional to 516,556.64, 712,526.40 and 355,131.44

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Solution

The fourth proportional to 516,556.64, 712,526.40 and 355,131.44 is: 489,860.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,556.64 : 712,526.40 = 355,131.44 : x
  2. Step 2: Convert to fraction form
    516,556.64/712,526.40 = 355,131.44/x
  3. Step 3: Cross multiply
    516,556.64x = 712,526.40 × 355,131.44
  4. Step 4: Simplify right side
    516,556.64x = 253,040,526,470.02
  5. Step 5: Solve for x
    x = 253,040,526,470.02/516,556.64
  6. Step 6: Final answer
    x = 489,860.18

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