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Finding the Fourth Proportional to 780,021, 1,170,031.52 and 189,045

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Solution

The fourth proportional to 780,021, 1,170,031.52 and 189,045 is: 283,567.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,021 : 1,170,031.52 = 189,045 : x
  2. Step 2: Convert to fraction form
    780,021/1,170,031.52 = 189,045/x
  3. Step 3: Cross multiply
    780,021x = 1,170,031.52 × 189,045
  4. Step 4: Simplify right side
    780,021x = 221,188,608,698.40
  5. Step 5: Solve for x
    x = 221,188,608,698.40/780,021
  6. Step 6: Final answer
    x = 283,567.50

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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.