Home / 820,607.10-1,230,795.45-259,698.30

Finding the Fourth Proportional to 820,607.10, 1,230,795.45 and 259,698.30

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Solution

The fourth proportional to 820,607.10, 1,230,795.45 and 259,698.30 is: 389,510.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,607.10 : 1,230,795.45 = 259,698.30 : x
  2. Step 2: Convert to fraction form
    820,607.10/1,230,795.45 = 259,698.30/x
  3. Step 3: Cross multiply
    820,607.10x = 1,230,795.45 × 259,698.30
  4. Step 4: Simplify right side
    820,607.10x = 319,635,486,012.74
  5. Step 5: Solve for x
    x = 319,635,486,012.74/820,607.10
  6. Step 6: Final answer
    x = 389,510.99

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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.