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Finding the Fourth Proportional to 290,090.40, 435,212.40 and 103,082.40

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Solution

The fourth proportional to 290,090.40, 435,212.40 and 103,082.40 is: 154,650.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,090.40 : 435,212.40 = 103,082.40 : x
  2. Step 2: Convert to fraction form
    290,090.40/435,212.40 = 103,082.40/x
  3. Step 3: Cross multiply
    290,090.40x = 435,212.40 × 103,082.40
  4. Step 4: Simplify right side
    290,090.40x = 44,862,738,701.76
  5. Step 5: Solve for x
    x = 44,862,738,701.76/290,090.40
  6. Step 6: Final answer
    x = 154,650.89

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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.