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Finding the Fourth Proportional to 320,424.80, 480,061.20 and 153,845.60

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Solution

The fourth proportional to 320,424.80, 480,061.20 and 153,845.60 is: 230,491.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,424.80 : 480,061.20 = 153,845.60 : x
  2. Step 2: Convert to fraction form
    320,424.80/480,061.20 = 153,845.60/x
  3. Step 3: Cross multiply
    320,424.80x = 480,061.20 × 153,845.60
  4. Step 4: Simplify right side
    320,424.80x = 73,855,303,350.72
  5. Step 5: Solve for x
    x = 73,855,303,350.72/320,424.80
  6. Step 6: Final answer
    x = 230,491.85

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1.5x scale

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.