Home / 989,801.70-1,485,091.35-390,660.90

Finding the Fourth Proportional to 989,801.70, 1,485,091.35 and 390,660.90

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Solution

The fourth proportional to 989,801.70, 1,485,091.35 and 390,660.90 is: 586,144.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,801.70 : 1,485,091.35 = 390,660.90 : x
  2. Step 2: Convert to fraction form
    989,801.70/1,485,091.35 = 390,660.90/x
  3. Step 3: Cross multiply
    989,801.70x = 1,485,091.35 × 390,660.90
  4. Step 4: Simplify right side
    989,801.70x = 580,167,123,373.22
  5. Step 5: Solve for x
    x = 580,167,123,373.22/989,801.70
  6. Step 6: Final answer
    x = 586,144.80

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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.