Home / 421,285.20-631,927.80-253,323.60

Finding the Fourth Proportional to 421,285.20, 631,927.80 and 253,323.60

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Solution

The fourth proportional to 421,285.20, 631,927.80 and 253,323.60 is: 379,985.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,285.20 : 631,927.80 = 253,323.60 : x
  2. Step 2: Convert to fraction form
    421,285.20/631,927.80 = 253,323.60/x
  3. Step 3: Cross multiply
    421,285.20x = 631,927.80 × 253,323.60
  4. Step 4: Simplify right side
    421,285.20x = 160,082,225,236.08
  5. Step 5: Solve for x
    x = 160,082,225,236.08/421,285.20
  6. Step 6: Final answer
    x = 379,985.40

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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.