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Finding the Fourth Proportional to 354,645.40, 531,968.10 and 291,659.80

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Solution

The fourth proportional to 354,645.40, 531,968.10 and 291,659.80 is: 437,489.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,645.40 : 531,968.10 = 291,659.80 : x
  2. Step 2: Convert to fraction form
    354,645.40/531,968.10 = 291,659.80/x
  3. Step 3: Cross multiply
    354,645.40x = 531,968.10 × 291,659.80
  4. Step 4: Simplify right side
    354,645.40x = 155,153,709,652.38
  5. Step 5: Solve for x
    x = 155,153,709,652.38/354,645.40
  6. Step 6: Final answer
    x = 437,489.70

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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.