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Finding the Fourth Proportional to 405,964.40, 607,780.20 and 248,500.40

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Solution

The fourth proportional to 405,964.40, 607,780.20 and 248,500.40 is: 372,036.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,964.40 : 607,780.20 = 248,500.40 : x
  2. Step 2: Convert to fraction form
    405,964.40/607,780.20 = 248,500.40/x
  3. Step 3: Cross multiply
    405,964.40x = 607,780.20 × 248,500.40
  4. Step 4: Simplify right side
    405,964.40x = 151,033,622,812.08
  5. Step 5: Solve for x
    x = 151,033,622,812.08/405,964.40
  6. Step 6: Final answer
    x = 372,036.62

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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.