Home / 669,940.80-1,004,911.20-404,220.30

Finding the Fourth Proportional to 669,940.80, 1,004,911.20 and 404,220.30

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Solution

The fourth proportional to 669,940.80, 1,004,911.20 and 404,220.30 is: 606,330.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,940.80 : 1,004,911.20 = 404,220.30 : x
  2. Step 2: Convert to fraction form
    669,940.80/1,004,911.20 = 404,220.30/x
  3. Step 3: Cross multiply
    669,940.80x = 1,004,911.20 × 404,220.30
  4. Step 4: Simplify right side
    669,940.80x = 406,205,506,737.36
  5. Step 5: Solve for x
    x = 406,205,506,737.36/669,940.80
  6. Step 6: Final answer
    x = 606,330.45

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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.