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Finding the Fourth Proportional to 282,321.84, 389,604.80 and 155,005.64

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Solution

The fourth proportional to 282,321.84, 389,604.80 and 155,005.64 is: 213,908.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,321.84 : 389,604.80 = 155,005.64 : x
  2. Step 2: Convert to fraction form
    282,321.84/389,604.80 = 155,005.64/x
  3. Step 3: Cross multiply
    282,321.84x = 389,604.80 × 155,005.64
  4. Step 4: Simplify right side
    282,321.84x = 60,390,941,371.07
  5. Step 5: Solve for x
    x = 60,390,941,371.07/282,321.84
  6. Step 6: Final answer
    x = 213,908.15

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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.