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Finding the Fourth Proportional to 320,437.80, 480,656.70 and 154,549.80

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Solution

The fourth proportional to 320,437.80, 480,656.70 and 154,549.80 is: 231,824.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,437.80 : 480,656.70 = 154,549.80 : x
  2. Step 2: Convert to fraction form
    320,437.80/480,656.70 = 154,549.80/x
  3. Step 3: Cross multiply
    320,437.80x = 480,656.70 × 154,549.80
  4. Step 4: Simplify right side
    320,437.80x = 74,285,396,853.66
  5. Step 5: Solve for x
    x = 74,285,396,853.66/320,437.80
  6. Step 6: Final answer
    x = 231,824.70

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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.