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Finding the Fourth Proportional to 738,138.30, 1,105,239.15 and 738,138.30

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Solution

The fourth proportional to 738,138.30, 1,105,239.15 and 738,138.30 is: 1,105,239.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,138.30 : 1,105,239.15 = 738,138.30 : x
  2. Step 2: Convert to fraction form
    738,138.30/1,105,239.15 = 738,138.30/x
  3. Step 3: Cross multiply
    738,138.30x = 1,105,239.15 × 738,138.30
  4. Step 4: Simplify right side
    738,138.30x = 815,819,347,274.45
  5. Step 5: Solve for x
    x = 815,819,347,274.45/738,138.30
  6. Step 6: Final answer
    x = 1,105,239.15

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Double scale
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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.