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Finding the Fourth Proportional to 873,504.60, 1,309,813.80 and 399,784.20

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Solution

The fourth proportional to 873,504.60, 1,309,813.80 and 399,784.20 is: 599,473.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,504.60 : 1,309,813.80 = 399,784.20 : x
  2. Step 2: Convert to fraction form
    873,504.60/1,309,813.80 = 399,784.20/x
  3. Step 3: Cross multiply
    873,504.60x = 1,309,813.80 × 399,784.20
  4. Step 4: Simplify right side
    873,504.60x = 523,642,862,181.96
  5. Step 5: Solve for x
    x = 523,642,862,181.96/873,504.60
  6. Step 6: Final answer
    x = 599,473.50

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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.