Home / 686,255.70-1,029,383.55-509,108.70

Finding the Fourth Proportional to 686,255.70, 1,029,383.55 and 509,108.70

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Solution

The fourth proportional to 686,255.70, 1,029,383.55 and 509,108.70 is: 763,663.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,255.70 : 1,029,383.55 = 509,108.70 : x
  2. Step 2: Convert to fraction form
    686,255.70/1,029,383.55 = 509,108.70/x
  3. Step 3: Cross multiply
    686,255.70x = 1,029,383.55 × 509,108.70
  4. Step 4: Simplify right side
    686,255.70x = 524,068,120,941.89
  5. Step 5: Solve for x
    x = 524,068,120,941.89/686,255.70
  6. Step 6: Final answer
    x = 763,663.05

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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.