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Finding the Fourth Proportional to 425,909.84, 639,280.26 and 351,785.12

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Solution

The fourth proportional to 425,909.84, 639,280.26 and 351,785.12 is: 528,020.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,909.84 : 639,280.26 = 351,785.12 : x
  2. Step 2: Convert to fraction form
    425,909.84/639,280.26 = 351,785.12/x
  3. Step 3: Cross multiply
    425,909.84x = 639,280.26 × 351,785.12
  4. Step 4: Simplify right side
    425,909.84x = 224,889,282,977.73
  5. Step 5: Solve for x
    x = 224,889,282,977.73/425,909.84
  6. Step 6: Final answer
    x = 528,020.87

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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.