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Finding the Fourth Proportional to 547,911.39, 755,628.21 and 343,981.32

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Solution

The fourth proportional to 547,911.39, 755,628.21 and 343,981.32 is: 474,386.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,911.39 : 755,628.21 = 343,981.32 : x
  2. Step 2: Convert to fraction form
    547,911.39/755,628.21 = 343,981.32/x
  3. Step 3: Cross multiply
    547,911.39x = 755,628.21 × 343,981.32
  4. Step 4: Simplify right side
    547,911.39x = 259,921,989,105.04
  5. Step 5: Solve for x
    x = 259,921,989,105.04/547,911.39
  6. Step 6: Final answer
    x = 474,386.91

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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.