Home / 420,762.48-631,328.70-221,036.46

Finding the Fourth Proportional to 420,762.48, 631,328.70 and 221,036.46

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Solution

The fourth proportional to 420,762.48, 631,328.70 and 221,036.46 is: 331,651.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,762.48 : 631,328.70 = 221,036.46 : x
  2. Step 2: Convert to fraction form
    420,762.48/631,328.70 = 221,036.46/x
  3. Step 3: Cross multiply
    420,762.48x = 631,328.70 × 221,036.46
  4. Step 4: Simplify right side
    420,762.48x = 139,546,660,944.40
  5. Step 5: Solve for x
    x = 139,546,660,944.40/420,762.48
  6. Step 6: Final answer
    x = 331,651.86

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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.