Home / 715,006,256.69-986,720,383.82-393,147,728.87

Finding the Fourth Proportional to 715,006,256.69, 986,720,383.82 and 393,147,728.87

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Solution

The fourth proportional to 715,006,256.69, 986,720,383.82 and 393,147,728.87 is: 542,550,326.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,006,256.69 : 986,720,383.82 = 393,147,728.87 : x
  2. Step 2: Convert to fraction form
    715,006,256.69/986,720,383.82 = 393,147,728.87/x
  3. Step 3: Cross multiply
    715,006,256.69x = 986,720,383.82 × 393,147,728.87
  4. Step 4: Simplify right side
    715,006,256.69x = 387,926,877,921,668,416
  5. Step 5: Solve for x
    x = 387,926,877,921,668,416/715,006,256.69
  6. Step 6: Final answer
    x = 542,550,326.37

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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.