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Finding the Fourth Proportional to 828,170.40, 1,242,428.40 and 472,893.60

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Solution

The fourth proportional to 828,170.40, 1,242,428.40 and 472,893.60 is: 709,439.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,170.40 : 1,242,428.40 = 472,893.60 : x
  2. Step 2: Convert to fraction form
    828,170.40/1,242,428.40 = 472,893.60/x
  3. Step 3: Cross multiply
    828,170.40x = 1,242,428.40 × 472,893.60
  4. Step 4: Simplify right side
    828,170.40x = 587,536,438,818.24
  5. Step 5: Solve for x
    x = 587,536,438,818.24/828,170.40
  6. Step 6: Final answer
    x = 709,439.07

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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.