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Finding the Fourth Proportional to 854.66, 1,280.70 and 624.02

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Solution

The fourth proportional to 854.66, 1,280.70 and 624.02 is: 935.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.66 : 1,280.70 = 624.02 : x
  2. Step 2: Convert to fraction form
    854.66/1,280.70 = 624.02/x
  3. Step 3: Cross multiply
    854.66x = 1,280.70 × 624.02
  4. Step 4: Simplify right side
    854.66x = 799,182.41
  5. Step 5: Solve for x
    x = 799,182.41/854.66
  6. Step 6: Final answer
    x = 935.09

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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.