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Finding the Fourth Proportional to 286,638.40, 429,958.64 and 86,960.48

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Solution

The fourth proportional to 286,638.40, 429,958.64 and 86,960.48 is: 130,441.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,638.40 : 429,958.64 = 86,960.48 : x
  2. Step 2: Convert to fraction form
    286,638.40/429,958.64 = 86,960.48/x
  3. Step 3: Cross multiply
    286,638.40x = 429,958.64 × 86,960.48
  4. Step 4: Simplify right side
    286,638.40x = 37,389,409,714.55
  5. Step 5: Solve for x
    x = 37,389,409,714.55/286,638.40
  6. Step 6: Final answer
    x = 130,441.04

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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.