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Finding the Fourth Proportional to 855,906.40, 1,283,276.40 and 406,842.40

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Solution

The fourth proportional to 855,906.40, 1,283,276.40 and 406,842.40 is: 609,986.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    855,906.40 : 1,283,276.40 = 406,842.40 : x
  2. Step 2: Convert to fraction form
    855,906.40/1,283,276.40 = 406,842.40/x
  3. Step 3: Cross multiply
    855,906.40x = 1,283,276.40 × 406,842.40
  4. Step 4: Simplify right side
    855,906.40x = 522,091,250,439.36
  5. Step 5: Solve for x
    x = 522,091,250,439.36/855,906.40
  6. Step 6: Final answer
    x = 609,986.38

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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.