Home / 820,385.40-1,230,578.10-610,433.40

Finding the Fourth Proportional to 820,385.40, 1,230,578.10 and 610,433.40

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Solution

The fourth proportional to 820,385.40, 1,230,578.10 and 610,433.40 is: 915,650.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,385.40 : 1,230,578.10 = 610,433.40 : x
  2. Step 2: Convert to fraction form
    820,385.40/1,230,578.10 = 610,433.40/x
  3. Step 3: Cross multiply
    820,385.40x = 1,230,578.10 × 610,433.40
  4. Step 4: Simplify right side
    820,385.40x = 751,185,973,548.54
  5. Step 5: Solve for x
    x = 751,185,973,548.54/820,385.40
  6. Step 6: Final answer
    x = 915,650.10

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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.