Home / 661,503.38-991,006.44-390,823.85

Finding the Fourth Proportional to 661,503.38, 991,006.44 and 390,823.85

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Solution

The fourth proportional to 661,503.38, 991,006.44 and 390,823.85 is: 585,498.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,503.38 : 991,006.44 = 390,823.85 : x
  2. Step 2: Convert to fraction form
    661,503.38/991,006.44 = 390,823.85/x
  3. Step 3: Cross multiply
    661,503.38x = 991,006.44 × 390,823.85
  4. Step 4: Simplify right side
    661,503.38x = 387,308,947,300.56
  5. Step 5: Solve for x
    x = 387,308,947,300.56/661,503.38
  6. Step 6: Final answer
    x = 585,498.07

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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.