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Finding the Fourth Proportional to 869,078.40, 1,302,062.40 and 735,331.20

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Solution

The fourth proportional to 869,078.40, 1,302,062.40 and 735,331.20 is: 1,101,680.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,078.40 : 1,302,062.40 = 735,331.20 : x
  2. Step 2: Convert to fraction form
    869,078.40/1,302,062.40 = 735,331.20/x
  3. Step 3: Cross multiply
    869,078.40x = 1,302,062.40 × 735,331.20
  4. Step 4: Simplify right side
    869,078.40x = 957,447,107,066.88
  5. Step 5: Solve for x
    x = 957,447,107,066.88/869,078.40
  6. Step 6: Final answer
    x = 1,101,680.94

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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.