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Finding the Fourth Proportional to 320,436.85, 480,688.21 and 120,925.21

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Solution

The fourth proportional to 320,436.85, 480,688.21 and 120,925.21 is: 181,400.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,436.85 : 480,688.21 = 120,925.21 : x
  2. Step 2: Convert to fraction form
    320,436.85/480,688.21 = 120,925.21/x
  3. Step 3: Cross multiply
    320,436.85x = 480,688.21 × 120,925.21
  4. Step 4: Simplify right side
    320,436.85x = 58,127,320,033.02
  5. Step 5: Solve for x
    x = 58,127,320,033.02/320,436.85
  6. Step 6: Final answer
    x = 181,400.24

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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.