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Finding the Fourth Proportional to 561,867, 775,364.67 and 307,218.20

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Solution

The fourth proportional to 561,867, 775,364.67 and 307,218.20 is: 423,954.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,867 : 775,364.67 = 307,218.20 : x
  2. Step 2: Convert to fraction form
    561,867/775,364.67 = 307,218.20/x
  3. Step 3: Cross multiply
    561,867x = 775,364.67 × 307,218.20
  4. Step 4: Simplify right side
    561,867x = 238,206,134,384.17
  5. Step 5: Solve for x
    x = 238,206,134,384.17/561,867
  6. Step 6: Final answer
    x = 423,954.66

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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.