Home / 828,991.60-1,243,487.40-429,499.60

Finding the Fourth Proportional to 828,991.60, 1,243,487.40 and 429,499.60

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Solution

The fourth proportional to 828,991.60, 1,243,487.40 and 429,499.60 is: 644,249.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,991.60 : 1,243,487.40 = 429,499.60 : x
  2. Step 2: Convert to fraction form
    828,991.60/1,243,487.40 = 429,499.60/x
  3. Step 3: Cross multiply
    828,991.60x = 1,243,487.40 × 429,499.60
  4. Step 4: Simplify right side
    828,991.60x = 534,077,340,905.04
  5. Step 5: Solve for x
    x = 534,077,340,905.04/828,991.60
  6. Step 6: Final answer
    x = 644,249.40

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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.