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Finding the Fourth Proportional to 805,788,509.80, 1,208,682,764.70 and 288,235,834.60

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Solution

The fourth proportional to 805,788,509.80, 1,208,682,764.70 and 288,235,834.60 is: 432,353,751.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,788,509.80 : 1,208,682,764.70 = 288,235,834.60 : x
  2. Step 2: Convert to fraction form
    805,788,509.80/1,208,682,764.70 = 288,235,834.60/x
  3. Step 3: Cross multiply
    805,788,509.80x = 1,208,682,764.70 × 288,235,834.60
  4. Step 4: Simplify right side
    805,788,509.80x = 348,385,685,449,939,968
  5. Step 5: Solve for x
    x = 348,385,685,449,939,968/805,788,509.80
  6. Step 6: Final answer
    x = 432,353,751.90

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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.