Home / 280,319,639.20-420,475,522.20-126,965,449.60

Finding the Fourth Proportional to 280,319,639.20, 420,475,522.20 and 126,965,449.60

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Solution

The fourth proportional to 280,319,639.20, 420,475,522.20 and 126,965,449.60 is: 190,446,391.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,319,639.20 : 420,475,522.20 = 126,965,449.60 : x
  2. Step 2: Convert to fraction form
    280,319,639.20/420,475,522.20 = 126,965,449.60/x
  3. Step 3: Cross multiply
    280,319,639.20x = 420,475,522.20 × 126,965,449.60
  4. Step 4: Simplify right side
    280,319,639.20x = 53,385,863,721,917,776
  5. Step 5: Solve for x
    x = 53,385,863,721,917,776/280,319,639.20
  6. Step 6: Final answer
    x = 190,446,391.39

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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.