Home / 989,991.78-1,484,749.62-457,000.80

Finding the Fourth Proportional to 989,991.78, 1,484,749.62 and 457,000.80

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Solution

The fourth proportional to 989,991.78, 1,484,749.62 and 457,000.80 is: 685,391.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,991.78 : 1,484,749.62 = 457,000.80 : x
  2. Step 2: Convert to fraction form
    989,991.78/1,484,749.62 = 457,000.80/x
  3. Step 3: Cross multiply
    989,991.78x = 1,484,749.62 × 457,000.80
  4. Step 4: Simplify right side
    989,991.78x = 678,531,764,139.70
  5. Step 5: Solve for x
    x = 678,531,764,139.70/989,991.78
  6. Step 6: Final answer
    x = 685,391.31

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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.