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Finding the Fourth Proportional to 320,857.20, 480,767.40 and 202,316.40

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Solution

The fourth proportional to 320,857.20, 480,767.40 and 202,316.40 is: 303,147.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,857.20 : 480,767.40 = 202,316.40 : x
  2. Step 2: Convert to fraction form
    320,857.20/480,767.40 = 202,316.40/x
  3. Step 3: Cross multiply
    320,857.20x = 480,767.40 × 202,316.40
  4. Step 4: Simplify right side
    320,857.20x = 97,267,129,605.36
  5. Step 5: Solve for x
    x = 97,267,129,605.36/320,857.20
  6. Step 6: Final answer
    x = 303,147.72

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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.