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Finding the Fourth Proportional to 478,339.04, 717,509.47 and 449,109.78

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Solution

The fourth proportional to 478,339.04, 717,509.47 and 449,109.78 is: 673,665.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,339.04 : 717,509.47 = 449,109.78 : x
  2. Step 2: Convert to fraction form
    478,339.04/717,509.47 = 449,109.78/x
  3. Step 3: Cross multiply
    478,339.04x = 717,509.47 × 449,109.78
  4. Step 4: Simplify right side
    478,339.04x = 322,240,520,219.62
  5. Step 5: Solve for x
    x = 322,240,520,219.62/478,339.04
  6. Step 6: Final answer
    x = 673,665.52

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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.