Home / 287,401,315.39-396,613,754.12-155,242,313.21

Finding the Fourth Proportional to 287,401,315.39, 396,613,754.12 and 155,242,313.21

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Solution

The fourth proportional to 287,401,315.39, 396,613,754.12 and 155,242,313.21 is: 214,234,359.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,401,315.39 : 396,613,754.12 = 155,242,313.21 : x
  2. Step 2: Convert to fraction form
    287,401,315.39/396,613,754.12 = 155,242,313.21/x
  3. Step 3: Cross multiply
    287,401,315.39x = 396,613,754.12 × 155,242,313.21
  4. Step 4: Simplify right side
    287,401,315.39x = 61,571,236,641,870,608
  5. Step 5: Solve for x
    x = 61,571,236,641,870,608/287,401,315.39
  6. Step 6: Final answer
    x = 214,234,359.22

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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.