Home / 290,326,857.90-435,490,286.85-128,768,793.90

Finding the Fourth Proportional to 290,326,857.90, 435,490,286.85 and 128,768,793.90

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Solution

The fourth proportional to 290,326,857.90, 435,490,286.85 and 128,768,793.90 is: 193,153,190.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,326,857.90 : 435,490,286.85 = 128,768,793.90 : x
  2. Step 2: Convert to fraction form
    290,326,857.90/435,490,286.85 = 128,768,793.90/x
  3. Step 3: Cross multiply
    290,326,857.90x = 435,490,286.85 × 128,768,793.90
  4. Step 4: Simplify right side
    290,326,857.90x = 56,077,558,992,839,536
  5. Step 5: Solve for x
    x = 56,077,558,992,839,536/290,326,857.90
  6. Step 6: Final answer
    x = 193,153,190.85

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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.