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Finding the Fourth Proportional to 639,260.80, 958,016.40 and 425,420.80

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Solution

The fourth proportional to 639,260.80, 958,016.40 and 425,420.80 is: 637,549.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,260.80 : 958,016.40 = 425,420.80 : x
  2. Step 2: Convert to fraction form
    639,260.80/958,016.40 = 425,420.80/x
  3. Step 3: Cross multiply
    639,260.80x = 958,016.40 × 425,420.80
  4. Step 4: Simplify right side
    639,260.80x = 407,560,103,301.12
  5. Step 5: Solve for x
    x = 407,560,103,301.12/639,260.80
  6. Step 6: Final answer
    x = 637,549.03

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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.