Home / 712,313,329.18-982,992,487.47-394,794,074.72

Finding the Fourth Proportional to 712,313,329.18, 982,992,487.47 and 394,794,074.72

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Solution

The fourth proportional to 712,313,329.18, 982,992,487.47 and 394,794,074.72 is: 544,815,874.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,313,329.18 : 982,992,487.47 = 394,794,074.72 : x
  2. Step 2: Convert to fraction form
    712,313,329.18/982,992,487.47 = 394,794,074.72/x
  3. Step 3: Cross multiply
    712,313,329.18x = 982,992,487.47 × 394,794,074.72
  4. Step 4: Simplify right side
    712,313,329.18x = 388,079,609,547,429,888
  5. Step 5: Solve for x
    x = 388,079,609,547,429,888/712,313,329.18
  6. Step 6: Final answer
    x = 544,815,874.77

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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.