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Finding the Fourth Proportional to 2,460.36, 3,690.18 and 921

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Solution

The fourth proportional to 2,460.36, 3,690.18 and 921 is: 1,381.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,460.36 : 3,690.18 = 921 : x
  2. Step 2: Convert to fraction form
    2,460.36/3,690.18 = 921/x
  3. Step 3: Cross multiply
    2,460.36x = 3,690.18 × 921
  4. Step 4: Simplify right side
    2,460.36x = 3,398,655.78
  5. Step 5: Solve for x
    x = 3,398,655.78/2,460.36
  6. Step 6: Final answer
    x = 1,381.37

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.