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Finding the Fourth Proportional to 282,401.44, 389,716.72 and 155,079.77

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Solution

The fourth proportional to 282,401.44, 389,716.72 and 155,079.77 is: 214,011.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,401.44 : 389,716.72 = 155,079.77 : x
  2. Step 2: Convert to fraction form
    282,401.44/389,716.72 = 155,079.77/x
  3. Step 3: Cross multiply
    282,401.44x = 389,716.72 × 155,079.77
  4. Step 4: Simplify right side
    282,401.44x = 60,437,176,966.47
  5. Step 5: Solve for x
    x = 60,437,176,966.47/282,401.44
  6. Step 6: Final answer
    x = 214,011.58

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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.