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Finding the Fourth Proportional to 690,936,805.60, 1,036,405,208.40 and 690,936,805.60

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Solution

The fourth proportional to 690,936,805.60, 1,036,405,208.40 and 690,936,805.60 is: 1,036,405,208.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,936,805.60 : 1,036,405,208.40 = 690,936,805.60 : x
  2. Step 2: Convert to fraction form
    690,936,805.60/1,036,405,208.40 = 690,936,805.60/x
  3. Step 3: Cross multiply
    690,936,805.60x = 1,036,405,208.40 × 690,936,805.60
  4. Step 4: Simplify right side
    690,936,805.60x = 716,090,503,999,098,240
  5. Step 5: Solve for x
    x = 716,090,503,999,098,240/690,936,805.60
  6. Step 6: Final answer
    x = 1,036,405,208.40

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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.