Home / 808,970,811.20-1,213,456,216.80-800,908,654.40

Finding the Fourth Proportional to 808,970,811.20, 1,213,456,216.80 and 800,908,654.40

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Solution

The fourth proportional to 808,970,811.20, 1,213,456,216.80 and 800,908,654.40 is: 1,201,362,981.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,970,811.20 : 1,213,456,216.80 = 800,908,654.40 : x
  2. Step 2: Convert to fraction form
    808,970,811.20/1,213,456,216.80 = 800,908,654.40/x
  3. Step 3: Cross multiply
    808,970,811.20x = 1,213,456,216.80 × 800,908,654.40
  4. Step 4: Simplify right side
    808,970,811.20x = 971,867,585,770,602,624
  5. Step 5: Solve for x
    x = 971,867,585,770,602,624/808,970,811.20
  6. Step 6: Final answer
    x = 1,201,362,981.60

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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.