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Finding the Fourth Proportional to 639,263.80, 958,020.90 and 425,423.80

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Solution

The fourth proportional to 639,263.80, 958,020.90 and 425,423.80 is: 637,553.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,263.80 : 958,020.90 = 425,423.80 : x
  2. Step 2: Convert to fraction form
    639,263.80/958,020.90 = 425,423.80/x
  3. Step 3: Cross multiply
    639,263.80x = 958,020.90 × 425,423.80
  4. Step 4: Simplify right side
    639,263.80x = 407,564,891,757.42
  5. Step 5: Solve for x
    x = 407,564,891,757.42/639,263.80
  6. Step 6: Final answer
    x = 637,553.53

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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.