Home / 689,455.20-1,034,182.80-512,308.20

Finding the Fourth Proportional to 689,455.20, 1,034,182.80 and 512,308.20

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Solution

The fourth proportional to 689,455.20, 1,034,182.80 and 512,308.20 is: 768,462.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,455.20 : 1,034,182.80 = 512,308.20 : x
  2. Step 2: Convert to fraction form
    689,455.20/1,034,182.80 = 512,308.20/x
  3. Step 3: Cross multiply
    689,455.20x = 1,034,182.80 × 512,308.20
  4. Step 4: Simplify right side
    689,455.20x = 529,820,328,738.96
  5. Step 5: Solve for x
    x = 529,820,328,738.96/689,455.20
  6. Step 6: Final answer
    x = 768,462.30

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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.