Home / 685,720.20-1,028,580.30-286,228.20

Finding the Fourth Proportional to 685,720.20, 1,028,580.30 and 286,228.20

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Solution

The fourth proportional to 685,720.20, 1,028,580.30 and 286,228.20 is: 429,342.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,720.20 : 1,028,580.30 = 286,228.20 : x
  2. Step 2: Convert to fraction form
    685,720.20/1,028,580.30 = 286,228.20/x
  3. Step 3: Cross multiply
    685,720.20x = 1,028,580.30 × 286,228.20
  4. Step 4: Simplify right side
    685,720.20x = 294,408,687,824.46
  5. Step 5: Solve for x
    x = 294,408,687,824.46/685,720.20
  6. Step 6: Final answer
    x = 429,342.30

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Double scale
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Similar ratio
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1.5x scale

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.