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Finding the Fourth Proportional to 391,613.70, 587,421 and 107,306.67

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Solution

The fourth proportional to 391,613.70, 587,421 and 107,306.67 is: 160,960.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,613.70 : 587,421 = 107,306.67 : x
  2. Step 2: Convert to fraction form
    391,613.70/587,421 = 107,306.67/x
  3. Step 3: Cross multiply
    391,613.70x = 587,421 × 107,306.67
  4. Step 4: Simplify right side
    391,613.70x = 63,034,191,398.07
  5. Step 5: Solve for x
    x = 63,034,191,398.07/391,613.70
  6. Step 6: Final answer
    x = 160,960.13

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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.