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Finding the Fourth Proportional to 288,010.80, 432,113.40 and 138,344.40

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Solution

The fourth proportional to 288,010.80, 432,113.40 and 138,344.40 is: 207,563.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,010.80 : 432,113.40 = 138,344.40 : x
  2. Step 2: Convert to fraction form
    288,010.80/432,113.40 = 138,344.40/x
  3. Step 3: Cross multiply
    288,010.80x = 432,113.40 × 138,344.40
  4. Step 4: Simplify right side
    288,010.80x = 59,780,469,054.96
  5. Step 5: Solve for x
    x = 59,780,469,054.96/288,010.80
  6. Step 6: Final answer
    x = 207,563.29

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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.