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Finding the Fourth Proportional to 258,984,573.60, 388,476,860.40 and 257,472,919.20

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Solution

The fourth proportional to 258,984,573.60, 388,476,860.40 and 257,472,919.20 is: 386,209,378.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,984,573.60 : 388,476,860.40 = 257,472,919.20 : x
  2. Step 2: Convert to fraction form
    258,984,573.60/388,476,860.40 = 257,472,919.20/x
  3. Step 3: Cross multiply
    258,984,573.60x = 388,476,860.40 × 257,472,919.20
  4. Step 4: Simplify right side
    258,984,573.60x = 100,022,271,288,838,864
  5. Step 5: Solve for x
    x = 100,022,271,288,838,864/258,984,573.60
  6. Step 6: Final answer
    x = 386,209,378.80

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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.