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Finding the Fourth Proportional to 281,805.60, 388,895.12 and 154,478.40

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Solution

The fourth proportional to 281,805.60, 388,895.12 and 154,478.40 is: 213,182.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,805.60 : 388,895.12 = 154,478.40 : x
  2. Step 2: Convert to fraction form
    281,805.60/388,895.12 = 154,478.40/x
  3. Step 3: Cross multiply
    281,805.60x = 388,895.12 × 154,478.40
  4. Step 4: Simplify right side
    281,805.60x = 60,075,895,905.41
  5. Step 5: Solve for x
    x = 60,075,895,905.41/281,805.60
  6. Step 6: Final answer
    x = 213,182.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.