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Finding the Fourth Proportional to 414,319.90, 621,807.90 and 161,721.40

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Solution

The fourth proportional to 414,319.90, 621,807.90 and 161,721.40 is: 242,710.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,319.90 : 621,807.90 = 161,721.40 : x
  2. Step 2: Convert to fraction form
    414,319.90/621,807.90 = 161,721.40/x
  3. Step 3: Cross multiply
    414,319.90x = 621,807.90 × 161,721.40
  4. Step 4: Simplify right side
    414,319.90x = 100,559,644,119.06
  5. Step 5: Solve for x
    x = 100,559,644,119.06/414,319.90
  6. Step 6: Final answer
    x = 242,710.15

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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.