Home / 678,851.70-1,018,277.55-636,861.30

Finding the Fourth Proportional to 678,851.70, 1,018,277.55 and 636,861.30

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Solution

The fourth proportional to 678,851.70, 1,018,277.55 and 636,861.30 is: 955,291.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,851.70 : 1,018,277.55 = 636,861.30 : x
  2. Step 2: Convert to fraction form
    678,851.70/1,018,277.55 = 636,861.30/x
  3. Step 3: Cross multiply
    678,851.70x = 1,018,277.55 × 636,861.30
  4. Step 4: Simplify right side
    678,851.70x = 648,501,564,253.82
  5. Step 5: Solve for x
    x = 648,501,564,253.82/678,851.70
  6. Step 6: Final answer
    x = 955,291.95

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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.