Home / 420,810.30-631,215.45-263,346.30

Finding the Fourth Proportional to 420,810.30, 631,215.45 and 263,346.30

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Solution

The fourth proportional to 420,810.30, 631,215.45 and 263,346.30 is: 395,019.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,810.30 : 631,215.45 = 263,346.30 : x
  2. Step 2: Convert to fraction form
    420,810.30/631,215.45 = 263,346.30/x
  3. Step 3: Cross multiply
    420,810.30x = 631,215.45 × 263,346.30
  4. Step 4: Simplify right side
    420,810.30x = 166,228,253,260.34
  5. Step 5: Solve for x
    x = 166,228,253,260.34/420,810.30
  6. Step 6: Final answer
    x = 395,019.45

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1.5x scale

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.