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Finding the Fourth Proportional to 658,431.40, 987,055.80 and 259,344.40

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Solution

The fourth proportional to 658,431.40, 987,055.80 and 259,344.40 is: 388,783.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,431.40 : 987,055.80 = 259,344.40 : x
  2. Step 2: Convert to fraction form
    658,431.40/987,055.80 = 259,344.40/x
  3. Step 3: Cross multiply
    658,431.40x = 987,055.80 × 259,344.40
  4. Step 4: Simplify right side
    658,431.40x = 255,987,394,217.52
  5. Step 5: Solve for x
    x = 255,987,394,217.52/658,431.40
  6. Step 6: Final answer
    x = 388,783.70

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1.5x scale

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.