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Finding the Fourth Proportional to 738,193, 1,018,706.28 and 398,661.20

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Solution

The fourth proportional to 738,193, 1,018,706.28 and 398,661.20 is: 550,152.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,193 : 1,018,706.28 = 398,661.20 : x
  2. Step 2: Convert to fraction form
    738,193/1,018,706.28 = 398,661.20/x
  3. Step 3: Cross multiply
    738,193x = 1,018,706.28 × 398,661.20
  4. Step 4: Simplify right side
    738,193x = 406,118,668,032.34
  5. Step 5: Solve for x
    x = 406,118,668,032.34/738,193
  6. Step 6: Final answer
    x = 550,152.42

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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.