Home / 861,289.20-1,188,554.31-479,307.78

Finding the Fourth Proportional to 861,289.20, 1,188,554.31 and 479,307.78

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Solution

The fourth proportional to 861,289.20, 1,188,554.31 and 479,307.78 is: 661,430.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,289.20 : 1,188,554.31 = 479,307.78 : x
  2. Step 2: Convert to fraction form
    861,289.20/1,188,554.31 = 479,307.78/x
  3. Step 3: Cross multiply
    861,289.20x = 1,188,554.31 × 479,307.78
  4. Step 4: Simplify right side
    861,289.20x = 569,683,327,735.53
  5. Step 5: Solve for x
    x = 569,683,327,735.53/861,289.20
  6. Step 6: Final answer
    x = 661,430.94

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Double scale
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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.