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Finding the Fourth Proportional to 561,781.63, 775,258.59 and 307,132.75

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Solution

The fourth proportional to 561,781.63, 775,258.59 and 307,132.75 is: 423,843.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,781.63 : 775,258.59 = 307,132.75 : x
  2. Step 2: Convert to fraction form
    561,781.63/775,258.59 = 307,132.75/x
  3. Step 3: Cross multiply
    561,781.63x = 775,258.59 × 307,132.75
  4. Step 4: Simplify right side
    561,781.63x = 238,107,302,707.82
  5. Step 5: Solve for x
    x = 238,107,302,707.82/561,781.63
  6. Step 6: Final answer
    x = 423,843.16

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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.