Home / 991,220.70-1,485,846.90-457,811.40

Finding the Fourth Proportional to 991,220.70, 1,485,846.90 and 457,811.40

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Solution

The fourth proportional to 991,220.70, 1,485,846.90 and 457,811.40 is: 686,262.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,220.70 : 1,485,846.90 = 457,811.40 : x
  2. Step 2: Convert to fraction form
    991,220.70/1,485,846.90 = 457,811.40/x
  3. Step 3: Cross multiply
    991,220.70x = 1,485,846.90 × 457,811.40
  4. Step 4: Simplify right side
    991,220.70x = 680,237,649,474.66
  5. Step 5: Solve for x
    x = 680,237,649,474.66/991,220.70
  6. Step 6: Final answer
    x = 686,262.55

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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.