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Finding the Fourth Proportional to 1,400.10, 1,930.50 and 902.76

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Solution

The fourth proportional to 1,400.10, 1,930.50 and 902.76 is: 1,244.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.10 : 1,930.50 = 902.76 : x
  2. Step 2: Convert to fraction form
    1,400.10/1,930.50 = 902.76/x
  3. Step 3: Cross multiply
    1,400.10x = 1,930.50 × 902.76
  4. Step 4: Simplify right side
    1,400.10x = 1,742,778.18
  5. Step 5: Solve for x
    x = 1,742,778.18/1,400.10
  6. Step 6: Final answer
    x = 1,244.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.