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Finding the Fourth Proportional to 643,297.56, 887,677 and 371,364.36

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Solution

The fourth proportional to 643,297.56, 887,677 and 371,364.36 is: 512,440.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,297.56 : 887,677 = 371,364.36 : x
  2. Step 2: Convert to fraction form
    643,297.56/887,677 = 371,364.36/x
  3. Step 3: Cross multiply
    643,297.56x = 887,677 × 371,364.36
  4. Step 4: Simplify right side
    643,297.56x = 329,651,600,991.72
  5. Step 5: Solve for x
    x = 329,651,600,991.72/643,297.56
  6. Step 6: Final answer
    x = 512,440.31

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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.