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Finding the Fourth Proportional to 808,262,605.20, 1,212,393,907.80 and 726,473,835.30

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Solution

The fourth proportional to 808,262,605.20, 1,212,393,907.80 and 726,473,835.30 is: 1,089,710,752.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,262,605.20 : 1,212,393,907.80 = 726,473,835.30 : x
  2. Step 2: Convert to fraction form
    808,262,605.20/1,212,393,907.80 = 726,473,835.30/x
  3. Step 3: Cross multiply
    808,262,605.20x = 1,212,393,907.80 × 726,473,835.30
  4. Step 4: Simplify right side
    808,262,605.20x = 880,772,452,093,820,544
  5. Step 5: Solve for x
    x = 880,772,452,093,820,544/808,262,605.20
  6. Step 6: Final answer
    x = 1,089,710,752.95

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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.