Home / 426,544,915.20-639,817,372.80-393,288,518.40

Finding the Fourth Proportional to 426,544,915.20, 639,817,372.80 and 393,288,518.40

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Solution

The fourth proportional to 426,544,915.20, 639,817,372.80 and 393,288,518.40 is: 589,932,777.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,544,915.20 : 639,817,372.80 = 393,288,518.40 : x
  2. Step 2: Convert to fraction form
    426,544,915.20/639,817,372.80 = 393,288,518.40/x
  3. Step 3: Cross multiply
    426,544,915.20x = 639,817,372.80 × 393,288,518.40
  4. Step 4: Simplify right side
    426,544,915.20x = 251,632,826,595,092,416
  5. Step 5: Solve for x
    x = 251,632,826,595,092,416/426,544,915.20
  6. Step 6: Final answer
    x = 589,932,777.60

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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.