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Finding the Fourth Proportional to 438,493.80, 657,999.90 and 289,165.80

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Solution

The fourth proportional to 438,493.80, 657,999.90 and 289,165.80 is: 433,919.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,493.80 : 657,999.90 = 289,165.80 : x
  2. Step 2: Convert to fraction form
    438,493.80/657,999.90 = 289,165.80/x
  3. Step 3: Cross multiply
    438,493.80x = 657,999.90 × 289,165.80
  4. Step 4: Simplify right side
    438,493.80x = 190,271,067,483.42
  5. Step 5: Solve for x
    x = 190,271,067,483.42/438,493.80
  6. Step 6: Final answer
    x = 433,919.63

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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.