Home / 640,788.40-884,272.32-354,301.12

Finding the Fourth Proportional to 640,788.40, 884,272.32 and 354,301.12

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Solution

The fourth proportional to 640,788.40, 884,272.32 and 354,301.12 is: 488,926.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,788.40 : 884,272.32 = 354,301.12 : x
  2. Step 2: Convert to fraction form
    640,788.40/884,272.32 = 354,301.12/x
  3. Step 3: Cross multiply
    640,788.40x = 884,272.32 × 354,301.12
  4. Step 4: Simplify right side
    640,788.40x = 313,298,673,361.00
  5. Step 5: Solve for x
    x = 313,298,673,361.00/640,788.40
  6. Step 6: Final answer
    x = 488,926.88

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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.