Home / 525,312,139.80-787,968,209.70-518,145,778.20

Finding the Fourth Proportional to 525,312,139.80, 787,968,209.70 and 518,145,778.20

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Solution

The fourth proportional to 525,312,139.80, 787,968,209.70 and 518,145,778.20 is: 777,218,667.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,312,139.80 : 787,968,209.70 = 518,145,778.20 : x
  2. Step 2: Convert to fraction form
    525,312,139.80/787,968,209.70 = 518,145,778.20/x
  3. Step 3: Cross multiply
    525,312,139.80x = 787,968,209.70 × 518,145,778.20
  4. Step 4: Simplify right side
    525,312,139.80x = 408,282,401,211,867,328
  5. Step 5: Solve for x
    x = 408,282,401,211,867,328/525,312,139.80
  6. Step 6: Final answer
    x = 777,218,667.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.