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Finding the Fourth Proportional to 904.05, 1,253.30 and 854.78

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Solution

The fourth proportional to 904.05, 1,253.30 and 854.78 is: 1,184.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.05 : 1,253.30 = 854.78 : x
  2. Step 2: Convert to fraction form
    904.05/1,253.30 = 854.78/x
  3. Step 3: Cross multiply
    904.05x = 1,253.30 × 854.78
  4. Step 4: Simplify right side
    904.05x = 1,071,285.23
  5. Step 5: Solve for x
    x = 1,071,285.23/904.05
  6. Step 6: Final answer
    x = 1,184.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.