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Finding the Fourth Proportional to 639,262.80, 958,019.40 and 425,422.80

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Solution

The fourth proportional to 639,262.80, 958,019.40 and 425,422.80 is: 637,552.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,262.80 : 958,019.40 = 425,422.80 : x
  2. Step 2: Convert to fraction form
    639,262.80/958,019.40 = 425,422.80/x
  3. Step 3: Cross multiply
    639,262.80x = 958,019.40 × 425,422.80
  4. Step 4: Simplify right side
    639,262.80x = 407,563,295,602.32
  5. Step 5: Solve for x
    x = 407,563,295,602.32/639,262.80
  6. Step 6: Final answer
    x = 637,552.03

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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.