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Finding the Fourth Proportional to 238,267.40, 328,809.90 and 129,371.90

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Solution

The fourth proportional to 238,267.40, 328,809.90 and 129,371.90 is: 178,533.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,267.40 : 328,809.90 = 129,371.90 : x
  2. Step 2: Convert to fraction form
    238,267.40/328,809.90 = 129,371.90/x
  3. Step 3: Cross multiply
    238,267.40x = 328,809.90 × 129,371.90
  4. Step 4: Simplify right side
    238,267.40x = 42,538,759,857.76
  5. Step 5: Solve for x
    x = 42,538,759,857.76/238,267.40
  6. Step 6: Final answer
    x = 178,533.70

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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.