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Finding the Fourth Proportional to 640,404.99, 883,759.95 and 353,925

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Solution

The fourth proportional to 640,404.99, 883,759.95 and 353,925 is: 488,417.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,404.99 : 883,759.95 = 353,925 : x
  2. Step 2: Convert to fraction form
    640,404.99/883,759.95 = 353,925/x
  3. Step 3: Cross multiply
    640,404.99x = 883,759.95 × 353,925
  4. Step 4: Simplify right side
    640,404.99x = 312,784,740,303.75
  5. Step 5: Solve for x
    x = 312,784,740,303.75/640,404.99
  6. Step 6: Final answer
    x = 488,417.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.