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Finding the Fourth Proportional to 667,341.18, 920,945.70 and 380,855.52

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Solution

The fourth proportional to 667,341.18, 920,945.70 and 380,855.52 is: 525,589.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,341.18 : 920,945.70 = 380,855.52 : x
  2. Step 2: Convert to fraction form
    667,341.18/920,945.70 = 380,855.52/x
  3. Step 3: Cross multiply
    667,341.18x = 920,945.70 × 380,855.52
  4. Step 4: Simplify right side
    667,341.18x = 350,747,253,465.26
  5. Step 5: Solve for x
    x = 350,747,253,465.26/667,341.18
  6. Step 6: Final answer
    x = 525,589.10

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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.