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Finding the Fourth Proportional to 307,064.88, 423,675.36 and 172,928.88

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Solution

The fourth proportional to 307,064.88, 423,675.36 and 172,928.88 is: 238,600.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,064.88 : 423,675.36 = 172,928.88 : x
  2. Step 2: Convert to fraction form
    307,064.88/423,675.36 = 172,928.88/x
  3. Step 3: Cross multiply
    307,064.88x = 423,675.36 × 172,928.88
  4. Step 4: Simplify right side
    307,064.88x = 73,265,705,488.40
  5. Step 5: Solve for x
    x = 73,265,705,488.40/307,064.88
  6. Step 6: Final answer
    x = 238,600.08

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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.