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Finding the Fourth Proportional to 539,186.40, 809,362.80 and 302,990.40

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Solution

The fourth proportional to 539,186.40, 809,362.80 and 302,990.40 is: 454,813.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,186.40 : 809,362.80 = 302,990.40 : x
  2. Step 2: Convert to fraction form
    539,186.40/809,362.80 = 302,990.40/x
  3. Step 3: Cross multiply
    539,186.40x = 809,362.80 × 302,990.40
  4. Step 4: Simplify right side
    539,186.40x = 245,229,158,517.12
  5. Step 5: Solve for x
    x = 245,229,158,517.12/539,186.40
  6. Step 6: Final answer
    x = 454,813.32

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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.