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Finding the Fourth Proportional to 438,441.80, 657,662.70 and 320,343.80

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Solution

The fourth proportional to 438,441.80, 657,662.70 and 320,343.80 is: 480,515.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,441.80 : 657,662.70 = 320,343.80 : x
  2. Step 2: Convert to fraction form
    438,441.80/657,662.70 = 320,343.80/x
  3. Step 3: Cross multiply
    438,441.80x = 657,662.70 × 320,343.80
  4. Step 4: Simplify right side
    438,441.80x = 210,678,168,436.26
  5. Step 5: Solve for x
    x = 210,678,168,436.26/438,441.80
  6. Step 6: Final answer
    x = 480,515.70

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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.