Home / 685,981.06-1,028,971.60-286,404.32

Finding the Fourth Proportional to 685,981.06, 1,028,971.60 and 286,404.32

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Solution

The fourth proportional to 685,981.06, 1,028,971.60 and 286,404.32 is: 429,606.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,981.06 : 1,028,971.60 = 286,404.32 : x
  2. Step 2: Convert to fraction form
    685,981.06/1,028,971.60 = 286,404.32/x
  3. Step 3: Cross multiply
    685,981.06x = 1,028,971.60 × 286,404.32
  4. Step 4: Simplify right side
    685,981.06x = 294,701,911,397.31
  5. Step 5: Solve for x
    x = 294,701,911,397.31/685,981.06
  6. Step 6: Final answer
    x = 429,606.48

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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.