Home / 669,421.60-1,004,132.40-404,000.80

Finding the Fourth Proportional to 669,421.60, 1,004,132.40 and 404,000.80

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Solution

The fourth proportional to 669,421.60, 1,004,132.40 and 404,000.80 is: 606,001.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,421.60 : 1,004,132.40 = 404,000.80 : x
  2. Step 2: Convert to fraction form
    669,421.60/1,004,132.40 = 404,000.80/x
  3. Step 3: Cross multiply
    669,421.60x = 1,004,132.40 × 404,000.80
  4. Step 4: Simplify right side
    669,421.60x = 405,670,292,905.92
  5. Step 5: Solve for x
    x = 405,670,292,905.92/669,421.60
  6. Step 6: Final answer
    x = 606,001.20

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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.