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Finding the Fourth Proportional to 405,844.40, 607,891.80 and 361,521.20

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Solution

The fourth proportional to 405,844.40, 607,891.80 and 361,521.20 is: 541,502.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,844.40 : 607,891.80 = 361,521.20 : x
  2. Step 2: Convert to fraction form
    405,844.40/607,891.80 = 361,521.20/x
  3. Step 3: Cross multiply
    405,844.40x = 607,891.80 × 361,521.20
  4. Step 4: Simplify right side
    405,844.40x = 219,765,773,006.16
  5. Step 5: Solve for x
    x = 219,765,773,006.16/405,844.40
  6. Step 6: Final answer
    x = 541,502.54

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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.