Home / 920,330.40-1,380,542.40-289,250.40

Finding the Fourth Proportional to 920,330.40, 1,380,542.40 and 289,250.40

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Solution

The fourth proportional to 920,330.40, 1,380,542.40 and 289,250.40 is: 433,890.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,330.40 : 1,380,542.40 = 289,250.40 : x
  2. Step 2: Convert to fraction form
    920,330.40/1,380,542.40 = 289,250.40/x
  3. Step 3: Cross multiply
    920,330.40x = 1,380,542.40 × 289,250.40
  4. Step 4: Simplify right side
    920,330.40x = 399,322,441,416.96
  5. Step 5: Solve for x
    x = 399,322,441,416.96/920,330.40
  6. Step 6: Final answer
    x = 433,890.31

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.