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Finding the Fourth Proportional to 667,291.40, 920,928.36 and 380,854.76

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Solution

The fourth proportional to 667,291.40, 920,928.36 and 380,854.76 is: 525,617.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,291.40 : 920,928.36 = 380,854.76 : x
  2. Step 2: Convert to fraction form
    667,291.40/920,928.36 = 380,854.76/x
  3. Step 3: Cross multiply
    667,291.40x = 920,928.36 × 380,854.76
  4. Step 4: Simplify right side
    667,291.40x = 350,739,949,524.99
  5. Step 5: Solve for x
    x = 350,739,949,524.99/667,291.40
  6. Step 6: Final answer
    x = 525,617.37

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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.