Home / 678,906.30-1,018,359.45-442,710.30

Finding the Fourth Proportional to 678,906.30, 1,018,359.45 and 442,710.30

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Solution

The fourth proportional to 678,906.30, 1,018,359.45 and 442,710.30 is: 664,065.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,906.30 : 1,018,359.45 = 442,710.30 : x
  2. Step 2: Convert to fraction form
    678,906.30/1,018,359.45 = 442,710.30/x
  3. Step 3: Cross multiply
    678,906.30x = 1,018,359.45 × 442,710.30
  4. Step 4: Simplify right side
    678,906.30x = 450,838,217,617.34
  5. Step 5: Solve for x
    x = 450,838,217,617.34/678,906.30
  6. Step 6: Final answer
    x = 664,065.45

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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.