Home / 715,945.77-988,008.84-393,676.65

Finding the Fourth Proportional to 715,945.77, 988,008.84 and 393,676.65

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Solution

The fourth proportional to 715,945.77, 988,008.84 and 393,676.65 is: 543,275.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,945.77 : 988,008.84 = 393,676.65 : x
  2. Step 2: Convert to fraction form
    715,945.77/988,008.84 = 393,676.65/x
  3. Step 3: Cross multiply
    715,945.77x = 988,008.84 × 393,676.65
  4. Step 4: Simplify right side
    715,945.77x = 388,956,010,301.59
  5. Step 5: Solve for x
    x = 388,956,010,301.59/715,945.77
  6. Step 6: Final answer
    x = 543,275.80

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1.5x scale

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.