Home / 680,923.40-1,021,385.10-345,000.20

Finding the Fourth Proportional to 680,923.40, 1,021,385.10 and 345,000.20

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Solution

The fourth proportional to 680,923.40, 1,021,385.10 and 345,000.20 is: 517,500.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,923.40 : 1,021,385.10 = 345,000.20 : x
  2. Step 2: Convert to fraction form
    680,923.40/1,021,385.10 = 345,000.20/x
  3. Step 3: Cross multiply
    680,923.40x = 1,021,385.10 × 345,000.20
  4. Step 4: Simplify right side
    680,923.40x = 352,378,063,777.02
  5. Step 5: Solve for x
    x = 352,378,063,777.02/680,923.40
  6. Step 6: Final answer
    x = 517,500.30

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Half scale
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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.