Home / 685,129,328.75-945,476,089.63-371,863,541.90

Finding the Fourth Proportional to 685,129,328.75, 945,476,089.63 and 371,863,541.90

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Solution

The fourth proportional to 685,129,328.75, 945,476,089.63 and 371,863,541.90 is: 513,170,393.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,129,328.75 : 945,476,089.63 = 371,863,541.90 : x
  2. Step 2: Convert to fraction form
    685,129,328.75/945,476,089.63 = 371,863,541.90/x
  3. Step 3: Cross multiply
    685,129,328.75x = 945,476,089.63 × 371,863,541.90
  4. Step 4: Simplify right side
    685,129,328.75x = 351,588,087,465,916,608
  5. Step 5: Solve for x
    x = 351,588,087,465,916,608/685,129,328.75
  6. Step 6: Final answer
    x = 513,170,393.84

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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.