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Finding the Fourth Proportional to 640,575.30, 883,993.59 and 354,095.31

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Solution

The fourth proportional to 640,575.30, 883,993.59 and 354,095.31 is: 488,651.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,575.30 : 883,993.59 = 354,095.31 : x
  2. Step 2: Convert to fraction form
    640,575.30/883,993.59 = 354,095.31/x
  3. Step 3: Cross multiply
    640,575.30x = 883,993.59 × 354,095.31
  4. Step 4: Simplify right side
    640,575.30x = 313,017,984,289.06
  5. Step 5: Solve for x
    x = 313,017,984,289.06/640,575.30
  6. Step 6: Final answer
    x = 488,651.35

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1.5x scale

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.