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Finding the Fourth Proportional to 738,216, 1,018,738.26 and 398,684.34

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Solution

The fourth proportional to 738,216, 1,018,738.26 and 398,684.34 is: 550,184.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,216 : 1,018,738.26 = 398,684.34 : x
  2. Step 2: Convert to fraction form
    738,216/1,018,738.26 = 398,684.34/x
  3. Step 3: Cross multiply
    738,216x = 1,018,738.26 × 398,684.34
  4. Step 4: Simplify right side
    738,216x = 406,154,990,820.85
  5. Step 5: Solve for x
    x = 406,154,990,820.85/738,216
  6. Step 6: Final answer
    x = 550,184.49

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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.