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Finding the Fourth Proportional to 667,009.08, 920,386.98 and 380,512.44

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Solution

The fourth proportional to 667,009.08, 920,386.98 and 380,512.44 is: 525,058.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,009.08 : 920,386.98 = 380,512.44 : x
  2. Step 2: Convert to fraction form
    667,009.08/920,386.98 = 380,512.44/x
  3. Step 3: Cross multiply
    667,009.08x = 920,386.98 × 380,512.44
  4. Step 4: Simplify right side
    667,009.08x = 350,218,695,504.03
  5. Step 5: Solve for x
    x = 350,218,695,504.03/667,009.08
  6. Step 6: Final answer
    x = 525,058.36

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1.5x scale

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.