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Finding the Fourth Proportional to 640,672.65, 884,090.34 and 354,175.65

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Solution

The fourth proportional to 640,672.65, 884,090.34 and 354,175.65 is: 488,741.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,672.65 : 884,090.34 = 354,175.65 : x
  2. Step 2: Convert to fraction form
    640,672.65/884,090.34 = 354,175.65/x
  3. Step 3: Cross multiply
    640,672.65x = 884,090.34 × 354,175.65
  4. Step 4: Simplify right side
    640,672.65x = 313,123,270,828.22
  5. Step 5: Solve for x
    x = 313,123,270,828.22/640,672.65
  6. Step 6: Final answer
    x = 488,741.44

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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.