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Finding the Fourth Proportional to 979,978.64, 1,352,408.91 and 670,530.33

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Solution

The fourth proportional to 979,978.64, 1,352,408.91 and 670,530.33 is: 925,358.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    979,978.64 : 1,352,408.91 = 670,530.33 : x
  2. Step 2: Convert to fraction form
    979,978.64/1,352,408.91 = 670,530.33/x
  3. Step 3: Cross multiply
    979,978.64x = 1,352,408.91 × 670,530.33
  4. Step 4: Simplify right side
    979,978.64x = 906,831,186,399.08
  5. Step 5: Solve for x
    x = 906,831,186,399.08/979,978.64
  6. Step 6: Final answer
    x = 925,358.12

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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.