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Finding the Fourth Proportional to 670,364.39, 925,401.05 and 398,520.29

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Solution

The fourth proportional to 670,364.39, 925,401.05 and 398,520.29 is: 550,135.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,364.39 : 925,401.05 = 398,520.29 : x
  2. Step 2: Convert to fraction form
    670,364.39/925,401.05 = 398,520.29/x
  3. Step 3: Cross multiply
    670,364.39x = 925,401.05 × 398,520.29
  4. Step 4: Simplify right side
    670,364.39x = 368,791,088,192.70
  5. Step 5: Solve for x
    x = 368,791,088,192.70/670,364.39
  6. Step 6: Final answer
    x = 550,135.26

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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.