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Finding the Fourth Proportional to 438,566.80, 657,850.20 and 320,468.80

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Solution

The fourth proportional to 438,566.80, 657,850.20 and 320,468.80 is: 480,703.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,566.80 : 657,850.20 = 320,468.80 : x
  2. Step 2: Convert to fraction form
    438,566.80/657,850.20 = 320,468.80/x
  3. Step 3: Cross multiply
    438,566.80x = 657,850.20 × 320,468.80
  4. Step 4: Simplify right side
    438,566.80x = 210,820,464,173.76
  5. Step 5: Solve for x
    x = 210,820,464,173.76/438,566.80
  6. Step 6: Final answer
    x = 480,703.20

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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.