Home / 640,788.40-961,328.60-341,111.08

Finding the Fourth Proportional to 640,788.40, 961,328.60 and 341,111.08

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Solution

The fourth proportional to 640,788.40, 961,328.60 and 341,111.08 is: 511,744.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,788.40 : 961,328.60 = 341,111.08 : x
  2. Step 2: Convert to fraction form
    640,788.40/961,328.60 = 341,111.08/x
  3. Step 3: Cross multiply
    640,788.40x = 961,328.60 × 341,111.08
  4. Step 4: Simplify right side
    640,788.40x = 327,919,830,468.69
  5. Step 5: Solve for x
    x = 327,919,830,468.69/640,788.40
  6. Step 6: Final answer
    x = 511,744.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.