Home / 685,758.09-1,028,138.90-286,513.04

Finding the Fourth Proportional to 685,758.09, 1,028,138.90 and 286,513.04

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Solution

The fourth proportional to 685,758.09, 1,028,138.90 and 286,513.04 is: 429,561.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,758.09 : 1,028,138.90 = 286,513.04 : x
  2. Step 2: Convert to fraction form
    685,758.09/1,028,138.90 = 286,513.04/x
  3. Step 3: Cross multiply
    685,758.09x = 1,028,138.90 × 286,513.04
  4. Step 4: Simplify right side
    685,758.09x = 294,575,201,781.26
  5. Step 5: Solve for x
    x = 294,575,201,781.26/685,758.09
  6. Step 6: Final answer
    x = 429,561.40

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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.