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Finding the Fourth Proportional to 561,837.28, 775,335.36 and 307,188.40

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Solution

The fourth proportional to 561,837.28, 775,335.36 and 307,188.40 is: 423,919.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,837.28 : 775,335.36 = 307,188.40 : x
  2. Step 2: Convert to fraction form
    561,837.28/775,335.36 = 307,188.40/x
  3. Step 3: Cross multiply
    561,837.28x = 775,335.36 × 307,188.40
  4. Step 4: Simplify right side
    561,837.28x = 238,174,028,701.82
  5. Step 5: Solve for x
    x = 238,174,028,701.82/561,837.28
  6. Step 6: Final answer
    x = 423,919.94

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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.