Home / 805,897.80-1,207,388.70-638,519.40

Finding the Fourth Proportional to 805,897.80, 1,207,388.70 and 638,519.40

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Solution

The fourth proportional to 805,897.80, 1,207,388.70 and 638,519.40 is: 956,623.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,897.80 : 1,207,388.70 = 638,519.40 : x
  2. Step 2: Convert to fraction form
    805,897.80/1,207,388.70 = 638,519.40/x
  3. Step 3: Cross multiply
    805,897.80x = 1,207,388.70 × 638,519.40
  4. Step 4: Simplify right side
    805,897.80x = 770,941,108,290.78
  5. Step 5: Solve for x
    x = 770,941,108,290.78/805,897.80
  6. Step 6: Final answer
    x = 956,623.91

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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.