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Finding the Fourth Proportional to 480,259.19, 720,495.74 and 143,305.67

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Solution

The fourth proportional to 480,259.19, 720,495.74 and 143,305.67 is: 214,990.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,259.19 : 720,495.74 = 143,305.67 : x
  2. Step 2: Convert to fraction form
    480,259.19/720,495.74 = 143,305.67/x
  3. Step 3: Cross multiply
    480,259.19x = 720,495.74 × 143,305.67
  4. Step 4: Simplify right side
    480,259.19x = 103,251,126,912.35
  5. Step 5: Solve for x
    x = 103,251,126,912.35/480,259.19
  6. Step 6: Final answer
    x = 214,990.42

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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.