Home / 420,890.46-631,428.96-121,347.66

Finding the Fourth Proportional to 420,890.46, 631,428.96 and 121,347.66

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Solution

The fourth proportional to 420,890.46, 631,428.96 and 121,347.66 is: 182,048.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,890.46 : 631,428.96 = 121,347.66 : x
  2. Step 2: Convert to fraction form
    420,890.46/631,428.96 = 121,347.66/x
  3. Step 3: Cross multiply
    420,890.46x = 631,428.96 × 121,347.66
  4. Step 4: Simplify right side
    420,890.46x = 76,622,426,752.23
  5. Step 5: Solve for x
    x = 76,622,426,752.23/420,890.46
  6. Step 6: Final answer
    x = 182,048.38

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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.