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Finding the Fourth Proportional to 400,189.71, 600,707.45 and 391,154.19

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Solution

The fourth proportional to 400,189.71, 600,707.45 and 391,154.19 is: 587,144.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,189.71 : 600,707.45 = 391,154.19 : x
  2. Step 2: Convert to fraction form
    400,189.71/600,707.45 = 391,154.19/x
  3. Step 3: Cross multiply
    400,189.71x = 600,707.45 × 391,154.19
  4. Step 4: Simplify right side
    400,189.71x = 234,969,234,075.95
  5. Step 5: Solve for x
    x = 234,969,234,075.95/400,189.71
  6. Step 6: Final answer
    x = 587,144.62

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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.