Home / 778,915.20-1,168,286.40-638,428.80

Finding the Fourth Proportional to 778,915.20, 1,168,286.40 and 638,428.80

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Solution

The fourth proportional to 778,915.20, 1,168,286.40 and 638,428.80 is: 957,572.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,915.20 : 1,168,286.40 = 638,428.80 : x
  2. Step 2: Convert to fraction form
    778,915.20/1,168,286.40 = 638,428.80/x
  3. Step 3: Cross multiply
    778,915.20x = 1,168,286.40 × 638,428.80
  4. Step 4: Simplify right side
    778,915.20x = 745,867,684,408.32
  5. Step 5: Solve for x
    x = 745,867,684,408.32/778,915.20
  6. Step 6: Final answer
    x = 957,572.38

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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.