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Finding the Fourth Proportional to 439,698.28, 659,572.92 and 124,128.76

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Solution

The fourth proportional to 439,698.28, 659,572.92 and 124,128.76 is: 186,200.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,698.28 : 659,572.92 = 124,128.76 : x
  2. Step 2: Convert to fraction form
    439,698.28/659,572.92 = 124,128.76/x
  3. Step 3: Cross multiply
    439,698.28x = 659,572.92 × 124,128.76
  4. Step 4: Simplify right side
    439,698.28x = 81,871,968,689.18
  5. Step 5: Solve for x
    x = 81,871,968,689.18/439,698.28
  6. Step 6: Final answer
    x = 186,200.34

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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.