Home / 420,947.19-631,027.13-154,636.20

Finding the Fourth Proportional to 420,947.19, 631,027.13 and 154,636.20

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Solution

The fourth proportional to 420,947.19, 631,027.13 and 154,636.20 is: 231,809.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,947.19 : 631,027.13 = 154,636.20 : x
  2. Step 2: Convert to fraction form
    420,947.19/631,027.13 = 154,636.20/x
  3. Step 3: Cross multiply
    420,947.19x = 631,027.13 × 154,636.20
  4. Step 4: Simplify right side
    420,947.19x = 97,579,636,706.93
  5. Step 5: Solve for x
    x = 97,579,636,706.93/420,947.19
  6. Step 6: Final answer
    x = 231,809.69

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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.