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Finding the Fourth Proportional to 1,273.36, 1,910.04 and 985

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Solution

The fourth proportional to 1,273.36, 1,910.04 and 985 is: 1,477.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.36 : 1,910.04 = 985 : x
  2. Step 2: Convert to fraction form
    1,273.36/1,910.04 = 985/x
  3. Step 3: Cross multiply
    1,273.36x = 1,910.04 × 985
  4. Step 4: Simplify right side
    1,273.36x = 1,881,389.40
  5. Step 5: Solve for x
    x = 1,881,389.40/1,273.36
  6. Step 6: Final answer
    x = 1,477.50

Related Problems

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Half scale
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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.