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Finding the Fourth Proportional to 281,382.40, 388,309.98 and 154,059.04

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Solution

The fourth proportional to 281,382.40, 388,309.98 and 154,059.04 is: 212,602.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,382.40 : 388,309.98 = 154,059.04 : x
  2. Step 2: Convert to fraction form
    281,382.40/388,309.98 = 154,059.04/x
  3. Step 3: Cross multiply
    281,382.40x = 388,309.98 × 154,059.04
  4. Step 4: Simplify right side
    281,382.40x = 59,822,662,741.22
  5. Step 5: Solve for x
    x = 59,822,662,741.22/281,382.40
  6. Step 6: Final answer
    x = 212,602.72

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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.