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Finding the Fourth Proportional to 640,474.32, 883,854.72 and 353,994.42

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Solution

The fourth proportional to 640,474.32, 883,854.72 and 353,994.42 is: 488,512.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,474.32 : 883,854.72 = 353,994.42 : x
  2. Step 2: Convert to fraction form
    640,474.32/883,854.72 = 353,994.42/x
  3. Step 3: Cross multiply
    640,474.32x = 883,854.72 × 353,994.42
  4. Step 4: Simplify right side
    640,474.32x = 312,879,638,970.66
  5. Step 5: Solve for x
    x = 312,879,638,970.66/640,474.32
  6. Step 6: Final answer
    x = 488,512.39

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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.