Home / 1,387,728.20-2,080,209.90-638,467.40

Finding the Fourth Proportional to 1,387,728.20, 2,080,209.90 and 638,467.40

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Solution

The fourth proportional to 1,387,728.20, 2,080,209.90 and 638,467.40 is: 957,065.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,728.20 : 2,080,209.90 = 638,467.40 : x
  2. Step 2: Convert to fraction form
    1,387,728.20/2,080,209.90 = 638,467.40/x
  3. Step 3: Cross multiply
    1,387,728.20x = 2,080,209.90 × 638,467.40
  4. Step 4: Simplify right side
    1,387,728.20x = 1,328,146,206,307.26
  5. Step 5: Solve for x
    x = 1,328,146,206,307.26/1,387,728.20
  6. Step 6: Final answer
    x = 957,065.08

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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.