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Finding the Fourth Proportional to 425,711.80, 587,173.53 and 289,503.64

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Solution

The fourth proportional to 425,711.80, 587,173.53 and 289,503.64 is: 399,305.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,711.80 : 587,173.53 = 289,503.64 : x
  2. Step 2: Convert to fraction form
    425,711.80/587,173.53 = 289,503.64/x
  3. Step 3: Cross multiply
    425,711.80x = 587,173.53 × 289,503.64
  4. Step 4: Simplify right side
    425,711.80x = 169,988,874,246.65
  5. Step 5: Solve for x
    x = 169,988,874,246.65/425,711.80
  6. Step 6: Final answer
    x = 399,305.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.