Home / 421,278.40-631,917.60-210,840.40

Finding the Fourth Proportional to 421,278.40, 631,917.60 and 210,840.40

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Solution

The fourth proportional to 421,278.40, 631,917.60 and 210,840.40 is: 316,260.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,278.40 : 631,917.60 = 210,840.40 : x
  2. Step 2: Convert to fraction form
    421,278.40/631,917.60 = 210,840.40/x
  3. Step 3: Cross multiply
    421,278.40x = 631,917.60 × 210,840.40
  4. Step 4: Simplify right side
    421,278.40x = 133,233,759,551.04
  5. Step 5: Solve for x
    x = 133,233,759,551.04/421,278.40
  6. Step 6: Final answer
    x = 316,260.60

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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.