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Finding the Fourth Proportional to 580,030.40, 868,879.20 and 391,073.60

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Solution

The fourth proportional to 580,030.40, 868,879.20 and 391,073.60 is: 585,823.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    580,030.40 : 868,879.20 = 391,073.60 : x
  2. Step 2: Convert to fraction form
    580,030.40/868,879.20 = 391,073.60/x
  3. Step 3: Cross multiply
    580,030.40x = 868,879.20 × 391,073.60
  4. Step 4: Simplify right side
    580,030.40x = 339,795,716,709.12
  5. Step 5: Solve for x
    x = 339,795,716,709.12/580,030.40
  6. Step 6: Final answer
    x = 585,823.98

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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.