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Finding the Fourth Proportional to 480,989.64, 721,507.70 and 126,004.01

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Solution

The fourth proportional to 480,989.64, 721,507.70 and 126,004.01 is: 189,012.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,989.64 : 721,507.70 = 126,004.01 : x
  2. Step 2: Convert to fraction form
    480,989.64/721,507.70 = 126,004.01/x
  3. Step 3: Cross multiply
    480,989.64x = 721,507.70 × 126,004.01
  4. Step 4: Simplify right side
    480,989.64x = 90,912,860,153.35
  5. Step 5: Solve for x
    x = 90,912,860,153.35/480,989.64
  6. Step 6: Final answer
    x = 189,012.09

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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.