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Finding the Fourth Proportional to 259,637.40, 389,456.10 and 215,897.40

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Solution

The fourth proportional to 259,637.40, 389,456.10 and 215,897.40 is: 323,846.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,637.40 : 389,456.10 = 215,897.40 : x
  2. Step 2: Convert to fraction form
    259,637.40/389,456.10 = 215,897.40/x
  3. Step 3: Cross multiply
    259,637.40x = 389,456.10 × 215,897.40
  4. Step 4: Simplify right side
    259,637.40x = 84,082,559,404.14
  5. Step 5: Solve for x
    x = 84,082,559,404.14/259,637.40
  6. Step 6: Final answer
    x = 323,846.10

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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.