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Finding the Fourth Proportional to 640,311.10, 883,641.98 and 349,940.64

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Solution

The fourth proportional to 640,311.10, 883,641.98 and 349,940.64 is: 482,925.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,311.10 : 883,641.98 = 349,940.64 : x
  2. Step 2: Convert to fraction form
    640,311.10/883,641.98 = 349,940.64/x
  3. Step 3: Cross multiply
    640,311.10x = 883,641.98 × 349,940.64
  4. Step 4: Simplify right side
    640,311.10x = 309,222,240,012.07
  5. Step 5: Solve for x
    x = 309,222,240,012.07/640,311.10
  6. Step 6: Final answer
    x = 482,925.00

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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.