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Finding the Fourth Proportional to 639,226.40, 958,175.40 and 259,984.40

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Solution

The fourth proportional to 639,226.40, 958,175.40 and 259,984.40 is: 389,706.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,226.40 : 958,175.40 = 259,984.40 : x
  2. Step 2: Convert to fraction form
    639,226.40/958,175.40 = 259,984.40/x
  3. Step 3: Cross multiply
    639,226.40x = 958,175.40 × 259,984.40
  4. Step 4: Simplify right side
    639,226.40x = 249,110,656,463.76
  5. Step 5: Solve for x
    x = 249,110,656,463.76/639,226.40
  6. Step 6: Final answer
    x = 389,706.46

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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.