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Finding the Fourth Proportional to 418,000.40, 626,611.80 and 291,640.40

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Solution

The fourth proportional to 418,000.40, 626,611.80 and 291,640.40 is: 437,189.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,000.40 : 626,611.80 = 291,640.40 : x
  2. Step 2: Convert to fraction form
    418,000.40/626,611.80 = 291,640.40/x
  3. Step 3: Cross multiply
    418,000.40x = 626,611.80 × 291,640.40
  4. Step 4: Simplify right side
    418,000.40x = 182,745,315,996.72
  5. Step 5: Solve for x
    x = 182,745,315,996.72/418,000.40
  6. Step 6: Final answer
    x = 437,189.33

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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.