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Finding the Fourth Proportional to 415,241.40, 621,549.90 and 326,011.80

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Solution

The fourth proportional to 415,241.40, 621,549.90 and 326,011.80 is: 487,987.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,241.40 : 621,549.90 = 326,011.80 : x
  2. Step 2: Convert to fraction form
    415,241.40/621,549.90 = 326,011.80/x
  3. Step 3: Cross multiply
    415,241.40x = 621,549.90 × 326,011.80
  4. Step 4: Simplify right side
    415,241.40x = 202,632,601,688.82
  5. Step 5: Solve for x
    x = 202,632,601,688.82/415,241.40
  6. Step 6: Final answer
    x = 487,987.47

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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.