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Finding the Fourth Proportional to 438,429.40, 657,644.10 and 349,199.80

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Solution

The fourth proportional to 438,429.40, 657,644.10 and 349,199.80 is: 523,799.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,429.40 : 657,644.10 = 349,199.80 : x
  2. Step 2: Convert to fraction form
    438,429.40/657,644.10 = 349,199.80/x
  3. Step 3: Cross multiply
    438,429.40x = 657,644.10 × 349,199.80
  4. Step 4: Simplify right side
    438,429.40x = 229,649,188,191.18
  5. Step 5: Solve for x
    x = 229,649,188,191.18/438,429.40
  6. Step 6: Final answer
    x = 523,799.70

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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.