Home / 663,621.97-915,771.94-391,777.45

Finding the Fourth Proportional to 663,621.97, 915,771.94 and 391,777.45

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Solution

The fourth proportional to 663,621.97, 915,771.94 and 391,777.45 is: 540,637.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,621.97 : 915,771.94 = 391,777.45 : x
  2. Step 2: Convert to fraction form
    663,621.97/915,771.94 = 391,777.45/x
  3. Step 3: Cross multiply
    663,621.97x = 915,771.94 × 391,777.45
  4. Step 4: Simplify right side
    663,621.97x = 358,778,794,369.63
  5. Step 5: Solve for x
    x = 358,778,794,369.63/663,621.97
  6. Step 6: Final answer
    x = 540,637.31

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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.