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Finding the Fourth Proportional to 809,208.80, 1,213,813.20 and 557,266.40

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Solution

The fourth proportional to 809,208.80, 1,213,813.20 and 557,266.40 is: 835,899.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,208.80 : 1,213,813.20 = 557,266.40 : x
  2. Step 2: Convert to fraction form
    809,208.80/1,213,813.20 = 557,266.40/x
  3. Step 3: Cross multiply
    809,208.80x = 1,213,813.20 × 557,266.40
  4. Step 4: Simplify right side
    809,208.80x = 676,417,312,236.48
  5. Step 5: Solve for x
    x = 676,417,312,236.48/809,208.80
  6. Step 6: Final answer
    x = 835,899.60

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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.