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Finding the Fourth Proportional to 624,550, 861,995.76 and 356,278

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Solution

The fourth proportional to 624,550, 861,995.76 and 356,278 is: 491,730.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,550 : 861,995.76 = 356,278 : x
  2. Step 2: Convert to fraction form
    624,550/861,995.76 = 356,278/x
  3. Step 3: Cross multiply
    624,550x = 861,995.76 × 356,278
  4. Step 4: Simplify right side
    624,550x = 307,110,125,381.28
  5. Step 5: Solve for x
    x = 307,110,125,381.28/624,550
  6. Step 6: Final answer
    x = 491,730.25

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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.