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Finding the Fourth Proportional to 445,534.40, 669,079.20 and 431,537.60

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Solution

The fourth proportional to 445,534.40, 669,079.20 and 431,537.60 is: 648,059.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,534.40 : 669,079.20 = 431,537.60 : x
  2. Step 2: Convert to fraction form
    445,534.40/669,079.20 = 431,537.60/x
  3. Step 3: Cross multiply
    445,534.40x = 669,079.20 × 431,537.60
  4. Step 4: Simplify right side
    445,534.40x = 288,732,832,177.92
  5. Step 5: Solve for x
    x = 288,732,832,177.92/445,534.40
  6. Step 6: Final answer
    x = 648,059.57

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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.