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Finding the Fourth Proportional to 453,973.40, 680,960.10 and 138,429.80

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Solution

The fourth proportional to 453,973.40, 680,960.10 and 138,429.80 is: 207,644.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,973.40 : 680,960.10 = 138,429.80 : x
  2. Step 2: Convert to fraction form
    453,973.40/680,960.10 = 138,429.80/x
  3. Step 3: Cross multiply
    453,973.40x = 680,960.10 × 138,429.80
  4. Step 4: Simplify right side
    453,973.40x = 94,265,170,450.98
  5. Step 5: Solve for x
    x = 94,265,170,450.98/453,973.40
  6. Step 6: Final answer
    x = 207,644.70

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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.