Home / 820,286.10-1,230,429.15-519,792.30

Finding the Fourth Proportional to 820,286.10, 1,230,429.15 and 519,792.30

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Solution

The fourth proportional to 820,286.10, 1,230,429.15 and 519,792.30 is: 779,688.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,286.10 : 1,230,429.15 = 519,792.30 : x
  2. Step 2: Convert to fraction form
    820,286.10/1,230,429.15 = 519,792.30/x
  3. Step 3: Cross multiply
    820,286.10x = 1,230,429.15 × 519,792.30
  4. Step 4: Simplify right side
    820,286.10x = 639,567,597,865.55
  5. Step 5: Solve for x
    x = 639,567,597,865.55/820,286.10
  6. Step 6: Final answer
    x = 779,688.45

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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.