Home / 678,803.40-1,018,205.10-398,176.20

Finding the Fourth Proportional to 678,803.40, 1,018,205.10 and 398,176.20

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Solution

The fourth proportional to 678,803.40, 1,018,205.10 and 398,176.20 is: 597,264.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,803.40 : 1,018,205.10 = 398,176.20 : x
  2. Step 2: Convert to fraction form
    678,803.40/1,018,205.10 = 398,176.20/x
  3. Step 3: Cross multiply
    678,803.40x = 1,018,205.10 × 398,176.20
  4. Step 4: Simplify right side
    678,803.40x = 405,425,037,538.62
  5. Step 5: Solve for x
    x = 405,425,037,538.62/678,803.40
  6. Step 6: Final answer
    x = 597,264.30

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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.