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Finding the Fourth Proportional to 659,430.20, 988,950.90 and 259,938.20

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Solution

The fourth proportional to 659,430.20, 988,950.90 and 259,938.20 is: 389,830.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,430.20 : 988,950.90 = 259,938.20 : x
  2. Step 2: Convert to fraction form
    659,430.20/988,950.90 = 259,938.20/x
  3. Step 3: Cross multiply
    659,430.20x = 988,950.90 × 259,938.20
  4. Step 4: Simplify right side
    659,430.20x = 257,066,116,834.38
  5. Step 5: Solve for x
    x = 257,066,116,834.38/659,430.20
  6. Step 6: Final answer
    x = 389,830.67

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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.