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Finding the Fourth Proportional to 286,878.90, 429,334.20 and 263,259.30

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Solution

The fourth proportional to 286,878.90, 429,334.20 and 263,259.30 is: 393,985.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,878.90 : 429,334.20 = 263,259.30 : x
  2. Step 2: Convert to fraction form
    286,878.90/429,334.20 = 263,259.30/x
  3. Step 3: Cross multiply
    286,878.90x = 429,334.20 × 263,259.30
  4. Step 4: Simplify right side
    286,878.90x = 113,026,220,958.06
  5. Step 5: Solve for x
    x = 113,026,220,958.06/286,878.90
  6. Step 6: Final answer
    x = 393,985.83

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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.