Home / 915,868.76-1,262,439.01-721,960.45

Finding the Fourth Proportional to 915,868.76, 1,262,439.01 and 721,960.45

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Solution

The fourth proportional to 915,868.76, 1,262,439.01 and 721,960.45 is: 995,154.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,868.76 : 1,262,439.01 = 721,960.45 : x
  2. Step 2: Convert to fraction form
    915,868.76/1,262,439.01 = 721,960.45/x
  3. Step 3: Cross multiply
    915,868.76x = 1,262,439.01 × 721,960.45
  4. Step 4: Simplify right side
    915,868.76x = 911,431,033,503.51
  5. Step 5: Solve for x
    x = 911,431,033,503.51/915,868.76
  6. Step 6: Final answer
    x = 995,154.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.