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Finding the Fourth Proportional to 320,439.60, 480,003.30 and 162,756.90

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Solution

The fourth proportional to 320,439.60, 480,003.30 and 162,756.90 is: 243,802.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,439.60 : 480,003.30 = 162,756.90 : x
  2. Step 2: Convert to fraction form
    320,439.60/480,003.30 = 162,756.90/x
  3. Step 3: Cross multiply
    320,439.60x = 480,003.30 × 162,756.90
  4. Step 4: Simplify right side
    320,439.60x = 78,123,849,097.77
  5. Step 5: Solve for x
    x = 78,123,849,097.77/320,439.60
  6. Step 6: Final answer
    x = 243,802.11

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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.