Home / 709,708.11-979,384.55-403,777.91

Finding the Fourth Proportional to 709,708.11, 979,384.55 and 403,777.91

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Solution

The fourth proportional to 709,708.11, 979,384.55 and 403,777.91 is: 557,206.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,708.11 : 979,384.55 = 403,777.91 : x
  2. Step 2: Convert to fraction form
    709,708.11/979,384.55 = 403,777.91/x
  3. Step 3: Cross multiply
    709,708.11x = 979,384.55 × 403,777.91
  4. Step 4: Simplify right side
    709,708.11x = 395,453,839,769.48
  5. Step 5: Solve for x
    x = 395,453,839,769.48/709,708.11
  6. Step 6: Final answer
    x = 557,206.31

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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.