Home / 288,619.80-432,638.10-130,961.40

Finding the Fourth Proportional to 288,619.80, 432,638.10 and 130,961.40

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Solution

The fourth proportional to 288,619.80, 432,638.10 and 130,961.40 is: 196,309.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,619.80 : 432,638.10 = 130,961.40 : x
  2. Step 2: Convert to fraction form
    288,619.80/432,638.10 = 130,961.40/x
  3. Step 3: Cross multiply
    288,619.80x = 432,638.10 × 130,961.40
  4. Step 4: Simplify right side
    288,619.80x = 56,658,891,269.34
  5. Step 5: Solve for x
    x = 56,658,891,269.34/288,619.80
  6. Step 6: Final answer
    x = 196,309.79

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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.