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Finding the Fourth Proportional to 659,315.80, 988,973.70 and 259,750.90

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Solution

The fourth proportional to 659,315.80, 988,973.70 and 259,750.90 is: 389,626.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,315.80 : 988,973.70 = 259,750.90 : x
  2. Step 2: Convert to fraction form
    659,315.80/988,973.70 = 259,750.90/x
  3. Step 3: Cross multiply
    659,315.80x = 988,973.70 × 259,750.90
  4. Step 4: Simplify right side
    659,315.80x = 256,886,808,651.33
  5. Step 5: Solve for x
    x = 256,886,808,651.33/659,315.80
  6. Step 6: Final answer
    x = 389,626.35

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Double scale
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Similar ratio
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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.