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Finding the Fourth Proportional to 281,428.32, 388,203.12 and 243,636.96

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Solution

The fourth proportional to 281,428.32, 388,203.12 and 243,636.96 is: 336,073.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,428.32 : 388,203.12 = 243,636.96 : x
  2. Step 2: Convert to fraction form
    281,428.32/388,203.12 = 243,636.96/x
  3. Step 3: Cross multiply
    281,428.32x = 388,203.12 × 243,636.96
  4. Step 4: Simplify right side
    281,428.32x = 94,580,628,019.32
  5. Step 5: Solve for x
    x = 94,580,628,019.32/281,428.32
  6. Step 6: Final answer
    x = 336,073.60

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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.