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Finding the Fourth Proportional to 678,337.10, 1,018,672.05 and 480,049.10

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Solution

The fourth proportional to 678,337.10, 1,018,672.05 and 480,049.10 is: 720,899.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,337.10 : 1,018,672.05 = 480,049.10 : x
  2. Step 2: Convert to fraction form
    678,337.10/1,018,672.05 = 480,049.10/x
  3. Step 3: Cross multiply
    678,337.10x = 1,018,672.05 × 480,049.10
  4. Step 4: Simplify right side
    678,337.10x = 489,012,600,797.66
  5. Step 5: Solve for x
    x = 489,012,600,797.66/678,337.10
  6. Step 6: Final answer
    x = 720,899.09

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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.