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Finding the Fourth Proportional to 478,495.98, 717,066.90 and 265,357.64

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Solution

The fourth proportional to 478,495.98, 717,066.90 and 265,357.64 is: 397,660.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,495.98 : 717,066.90 = 265,357.64 : x
  2. Step 2: Convert to fraction form
    478,495.98/717,066.90 = 265,357.64/x
  3. Step 3: Cross multiply
    478,495.98x = 717,066.90 × 265,357.64
  4. Step 4: Simplify right side
    478,495.98x = 190,279,176,720.78
  5. Step 5: Solve for x
    x = 190,279,176,720.78/478,495.98
  6. Step 6: Final answer
    x = 397,660.97

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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.