Home / 912,000.20-1,368,000.30-613,401.80

Finding the Fourth Proportional to 912,000.20, 1,368,000.30 and 613,401.80

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Solution

The fourth proportional to 912,000.20, 1,368,000.30 and 613,401.80 is: 920,102.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,000.20 : 1,368,000.30 = 613,401.80 : x
  2. Step 2: Convert to fraction form
    912,000.20/1,368,000.30 = 613,401.80/x
  3. Step 3: Cross multiply
    912,000.20x = 1,368,000.30 × 613,401.80
  4. Step 4: Simplify right side
    912,000.20x = 839,133,846,420.54
  5. Step 5: Solve for x
    x = 839,133,846,420.54/912,000.20
  6. Step 6: Final answer
    x = 920,102.70

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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.