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Finding the Fourth Proportional to 384,901.66, 531,142.86 and 212,809.69

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Solution

The fourth proportional to 384,901.66, 531,142.86 and 212,809.69 is: 293,665.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,901.66 : 531,142.86 = 212,809.69 : x
  2. Step 2: Convert to fraction form
    384,901.66/531,142.86 = 212,809.69/x
  3. Step 3: Cross multiply
    384,901.66x = 531,142.86 × 212,809.69
  4. Step 4: Simplify right side
    384,901.66x = 113,032,347,382.31
  5. Step 5: Solve for x
    x = 113,032,347,382.31/384,901.66
  6. Step 6: Final answer
    x = 293,665.52

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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.