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Finding the Fourth Proportional to 640,285.20, 959,771.70 and 373,908.60

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Solution

The fourth proportional to 640,285.20, 959,771.70 and 373,908.60 is: 560,479.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,285.20 : 959,771.70 = 373,908.60 : x
  2. Step 2: Convert to fraction form
    640,285.20/959,771.70 = 373,908.60/x
  3. Step 3: Cross multiply
    640,285.20x = 959,771.70 × 373,908.60
  4. Step 4: Simplify right side
    640,285.20x = 358,866,892,666.62
  5. Step 5: Solve for x
    x = 358,866,892,666.62/640,285.20
  6. Step 6: Final answer
    x = 560,479.76

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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.