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Finding the Fourth Proportional to 658,435.80, 987,653.70 and 259,089.60

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Solution

The fourth proportional to 658,435.80, 987,653.70 and 259,089.60 is: 388,634.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,435.80 : 987,653.70 = 259,089.60 : x
  2. Step 2: Convert to fraction form
    658,435.80/987,653.70 = 259,089.60/x
  3. Step 3: Cross multiply
    658,435.80x = 987,653.70 × 259,089.60
  4. Step 4: Simplify right side
    658,435.80x = 255,890,802,071.52
  5. Step 5: Solve for x
    x = 255,890,802,071.52/658,435.80
  6. Step 6: Final answer
    x = 388,634.40

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Double scale
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Similar ratio
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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.