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Finding the Fourth Proportional to 1,213,398,423.70, 1,820,621,978.49 and 652,504,676.17

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Solution

The fourth proportional to 1,213,398,423.70, 1,820,621,978.49 and 652,504,676.17 is: 979,038,979.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213,398,423.70 : 1,820,621,978.49 = 652,504,676.17 : x
  2. Step 2: Convert to fraction form
    1,213,398,423.70/1,820,621,978.49 = 652,504,676.17/x
  3. Step 3: Cross multiply
    1,213,398,423.70x = 1,820,621,978.49 × 652,504,676.17
  4. Step 4: Simplify right side
    1,213,398,423.70x = 1,187,964,354,502,601,984
  5. Step 5: Solve for x
    x = 1,187,964,354,502,601,984/1,213,398,423.70
  6. Step 6: Final answer
    x = 979,038,979.53

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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.