Home / 428,657.16-643,056.82-144,371.77

Finding the Fourth Proportional to 428,657.16, 643,056.82 and 144,371.77

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Solution

The fourth proportional to 428,657.16, 643,056.82 and 144,371.77 is: 216,581.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,657.16 : 643,056.82 = 144,371.77 : x
  2. Step 2: Convert to fraction form
    428,657.16/643,056.82 = 144,371.77/x
  3. Step 3: Cross multiply
    428,657.16x = 643,056.82 × 144,371.77
  4. Step 4: Simplify right side
    428,657.16x = 92,839,250,157.49
  5. Step 5: Solve for x
    x = 92,839,250,157.49/428,657.16
  6. Step 6: Final answer
    x = 216,581.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.