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Finding the Fourth Proportional to 920,810,401.20, 1,381,215,601.80 and 920,810,401.20

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Solution

The fourth proportional to 920,810,401.20, 1,381,215,601.80 and 920,810,401.20 is: 1,381,215,601.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,810,401.20 : 1,381,215,601.80 = 920,810,401.20 : x
  2. Step 2: Convert to fraction form
    920,810,401.20/1,381,215,601.80 = 920,810,401.20/x
  3. Step 3: Cross multiply
    920,810,401.20x = 1,381,215,601.80 × 920,810,401.20
  4. Step 4: Simplify right side
    920,810,401.20x = 1,271,837,692,437,157,376
  5. Step 5: Solve for x
    x = 1,271,837,692,437,157,376/920,810,401.20
  6. Step 6: Final answer
    x = 1,381,215,601.80

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1.5x scale

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.