Home / 1,288,561.80-1,778,166.60-715,638.88

Finding the Fourth Proportional to 1,288,561.80, 1,778,166.60 and 715,638.88

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Solution

The fourth proportional to 1,288,561.80, 1,778,166.60 and 715,638.88 is: 987,554.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,561.80 : 1,778,166.60 = 715,638.88 : x
  2. Step 2: Convert to fraction form
    1,288,561.80/1,778,166.60 = 715,638.88/x
  3. Step 3: Cross multiply
    1,288,561.80x = 1,778,166.60 × 715,638.88
  4. Step 4: Simplify right side
    1,288,561.80x = 1,272,525,146,948.35
  5. Step 5: Solve for x
    x = 1,272,525,146,948.35/1,288,561.80
  6. Step 6: Final answer
    x = 987,554.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.