Home / 428,814.43-643,057.62-144,428.45

Finding the Fourth Proportional to 428,814.43, 643,057.62 and 144,428.45

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Solution

The fourth proportional to 428,814.43, 643,057.62 and 144,428.45 is: 216,587.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,814.43 : 643,057.62 = 144,428.45 : x
  2. Step 2: Convert to fraction form
    428,814.43/643,057.62 = 144,428.45/x
  3. Step 3: Cross multiply
    428,814.43x = 643,057.62 × 144,428.45
  4. Step 4: Simplify right side
    428,814.43x = 92,875,818,499.80
  5. Step 5: Solve for x
    x = 92,875,818,499.80/428,814.43
  6. Step 6: Final answer
    x = 216,587.44

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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.