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Finding the Fourth Proportional to 555,040.80, 831,686.40 and 465,811.20

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Solution

The fourth proportional to 555,040.80, 831,686.40 and 465,811.20 is: 697,982.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,040.80 : 831,686.40 = 465,811.20 : x
  2. Step 2: Convert to fraction form
    555,040.80/831,686.40 = 465,811.20/x
  3. Step 3: Cross multiply
    555,040.80x = 831,686.40 × 465,811.20
  4. Step 4: Simplify right side
    555,040.80x = 387,408,840,007.68
  5. Step 5: Solve for x
    x = 387,408,840,007.68/555,040.80
  6. Step 6: Final answer
    x = 697,982.63

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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.