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Finding the Fourth Proportional to 659,618.40, 988,995.60 and 260,018.40

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Solution

The fourth proportional to 659,618.40, 988,995.60 and 260,018.40 is: 389,857.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,618.40 : 988,995.60 = 260,018.40 : x
  2. Step 2: Convert to fraction form
    659,618.40/988,995.60 = 260,018.40/x
  3. Step 3: Cross multiply
    659,618.40x = 988,995.60 × 260,018.40
  4. Step 4: Simplify right side
    659,618.40x = 257,157,053,519.04
  5. Step 5: Solve for x
    x = 257,157,053,519.04/659,618.40
  6. Step 6: Final answer
    x = 389,857.31

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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.