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Finding the Fourth Proportional to 1,290.10, 1,938.03 and 1,241.50

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Solution

The fourth proportional to 1,290.10, 1,938.03 and 1,241.50 is: 1,865.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.10 : 1,938.03 = 1,241.50 : x
  2. Step 2: Convert to fraction form
    1,290.10/1,938.03 = 1,241.50/x
  3. Step 3: Cross multiply
    1,290.10x = 1,938.03 × 1,241.50
  4. Step 4: Simplify right side
    1,290.10x = 2,406,064.25
  5. Step 5: Solve for x
    x = 2,406,064.25/1,290.10
  6. Step 6: Final answer
    x = 1,865.02

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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.