Home / 920,143.80-1,380,215.70-470,715.30

Finding the Fourth Proportional to 920,143.80, 1,380,215.70 and 470,715.30

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Solution

The fourth proportional to 920,143.80, 1,380,215.70 and 470,715.30 is: 706,072.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,143.80 : 1,380,215.70 = 470,715.30 : x
  2. Step 2: Convert to fraction form
    920,143.80/1,380,215.70 = 470,715.30/x
  3. Step 3: Cross multiply
    920,143.80x = 1,380,215.70 × 470,715.30
  4. Step 4: Simplify right side
    920,143.80x = 649,688,647,290.21
  5. Step 5: Solve for x
    x = 649,688,647,290.21/920,143.80
  6. Step 6: Final answer
    x = 706,072.95

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Double scale
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Similar ratio
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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.