Home / 431,569,389.10-647,354,083.65-428,546,080.30

Finding the Fourth Proportional to 431,569,389.10, 647,354,083.65 and 428,546,080.30

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Solution

The fourth proportional to 431,569,389.10, 647,354,083.65 and 428,546,080.30 is: 642,819,120.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,569,389.10 : 647,354,083.65 = 428,546,080.30 : x
  2. Step 2: Convert to fraction form
    431,569,389.10/647,354,083.65 = 428,546,080.30/x
  3. Step 3: Cross multiply
    431,569,389.10x = 647,354,083.65 × 428,546,080.30
  4. Step 4: Simplify right side
    431,569,389.10x = 277,421,055,114,405,824
  5. Step 5: Solve for x
    x = 277,421,055,114,405,824/431,569,389.10
  6. Step 6: Final answer
    x = 642,819,120.45

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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.