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Finding the Fourth Proportional to 391,567.80, 587,351.70 and 256,848.60

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Solution

The fourth proportional to 391,567.80, 587,351.70 and 256,848.60 is: 385,272.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,567.80 : 587,351.70 = 256,848.60 : x
  2. Step 2: Convert to fraction form
    391,567.80/587,351.70 = 256,848.60/x
  3. Step 3: Cross multiply
    391,567.80x = 587,351.70 × 256,848.60
  4. Step 4: Simplify right side
    391,567.80x = 150,860,461,852.62
  5. Step 5: Solve for x
    x = 150,860,461,852.62/391,567.80
  6. Step 6: Final answer
    x = 385,272.90

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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.