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Finding the Fourth Proportional to 480,978.72, 721,566.48 and 165,394.64

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Solution

The fourth proportional to 480,978.72, 721,566.48 and 165,394.64 is: 248,125.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,978.72 : 721,566.48 = 165,394.64 : x
  2. Step 2: Convert to fraction form
    480,978.72/721,566.48 = 165,394.64/x
  3. Step 3: Cross multiply
    480,978.72x = 721,566.48 × 165,394.64
  4. Step 4: Simplify right side
    480,978.72x = 119,343,228,195.67
  5. Step 5: Solve for x
    x = 119,343,228,195.67/480,978.72
  6. Step 6: Final answer
    x = 248,125.80

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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.