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Finding the Fourth Proportional to 659,417.40, 988,694.10 and 259,817.40

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Solution

The fourth proportional to 659,417.40, 988,694.10 and 259,817.40 is: 389,555.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,417.40 : 988,694.10 = 259,817.40 : x
  2. Step 2: Convert to fraction form
    659,417.40/988,694.10 = 259,817.40/x
  3. Step 3: Cross multiply
    659,417.40x = 988,694.10 × 259,817.40
  4. Step 4: Simplify right side
    659,417.40x = 256,879,930,457.34
  5. Step 5: Solve for x
    x = 256,879,930,457.34/659,417.40
  6. Step 6: Final answer
    x = 389,555.89

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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.