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Finding the Fourth Proportional to 480,014.60, 720,021.90 and 143,054.60

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Solution

The fourth proportional to 480,014.60, 720,021.90 and 143,054.60 is: 214,581.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,014.60 : 720,021.90 = 143,054.60 : x
  2. Step 2: Convert to fraction form
    480,014.60/720,021.90 = 143,054.60/x
  3. Step 3: Cross multiply
    480,014.60x = 720,021.90 × 143,054.60
  4. Step 4: Simplify right side
    480,014.60x = 103,002,444,895.74
  5. Step 5: Solve for x
    x = 103,002,444,895.74/480,014.60
  6. Step 6: Final answer
    x = 214,581.90

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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.