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Finding the Fourth Proportional to 1,362,805,900.80, 2,039,505,926.40 and 817,938,470.40

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Solution

The fourth proportional to 1,362,805,900.80, 2,039,505,926.40 and 817,938,470.40 is: 1,224,085,070.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,362,805,900.80 : 2,039,505,926.40 = 817,938,470.40 : x
  2. Step 2: Convert to fraction form
    1,362,805,900.80/2,039,505,926.40 = 817,938,470.40/x
  3. Step 3: Cross multiply
    1,362,805,900.80x = 2,039,505,926.40 × 817,938,470.40
  4. Step 4: Simplify right side
    1,362,805,900.80x = 1,668,190,357,811,351,040
  5. Step 5: Solve for x
    x = 1,668,190,357,811,351,040/1,362,805,900.80
  6. Step 6: Final answer
    x = 1,224,085,070.98

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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.