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Finding the Fourth Proportional to 442,920.30, 664,477.65 and 143,349.90

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Solution

The fourth proportional to 442,920.30, 664,477.65 and 143,349.90 is: 215,056.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,920.30 : 664,477.65 = 143,349.90 : x
  2. Step 2: Convert to fraction form
    442,920.30/664,477.65 = 143,349.90/x
  3. Step 3: Cross multiply
    442,920.30x = 664,477.65 × 143,349.90
  4. Step 4: Simplify right side
    442,920.30x = 95,252,804,679.74
  5. Step 5: Solve for x
    x = 95,252,804,679.74/442,920.30
  6. Step 6: Final answer
    x = 215,056.31

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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.